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NOS

Isoform-selective Products

nNOS eNOS iNOS

NOS Products

All (34)
NOS Inhibitors (24)
NOS Activators (2)
NOS Agonist (1)
NOS Modulator (1)
New NOS Products

Catalog No.	Product Name	Information	Product Use Citations
S8639	DPI (Diphenyleneiodonium chloride)	DPI (Diphenyleneiodonium chloride) is an inhibitor of NADPH oxidase and also a potent, irreversible, and time-, temperature-dependent iNOS/eNOS inhibitor. Diphenyleneiodonium chloride (DPI) also functions as a TRPA1 activator and selectively inhibits intracellular reactive oxygen species (ROS).	Redox Biol, 2025, 80:103485 Exp Mol Med, 2024, 56(12):2602-2616 Phytomedicine, 2024, 136:156283
S2877	L-NAME HCl	L-NAME HCl (NG-Nitroarginine methyl ester, N-Nitro-L-arginine methylester) is a nonselective inhibitor of nitric oxide synthetases (NOS) for nNOS (bovine), eNOS (human), and iNOS (murine), with K_i of 15 nM, 39 nM and 4.4 μM, respectively. L-NAME HCl can be used to induce animal models of Hypertension.	Commun Biol, 2025, 8(1):201 Nat Neurosci, 2024, 10.1038/s41593-024-01604-8 J Cell Mol Med, 2024, 28(21):e70203
S8337	1400W 2HCl	1400W (N-(3-(Aminomethyl)benzyl)acetamidine) is a slow, tight binding, and highly selective inhibitor of inducible nitric-oxide synthase(iNOS).	Nat Commun, 2025, 16(1):3570 Biomolecules, 2025, 15(1)125 Nat Commun, 2024, 15(1):2698
S4548	Aminoguanidine hydrochloride	Aminoguanidine (Pimagedine, Guanyl hydrazine, Hydrazinecarboximidamide, Imino semicarbazide, Monoaminoguanidine) is a diamine oxidase and nitric oxide synthase inhibitor. It acts to reduce levels of advanced glycation end products (AGEs) through interacting with 3-deoxyglucosone.	Anim Biotechnol, 2021, 1-10 Anim Biotechnol, 2021, 1-8 Am J Cancer Res, 2020, 10(5):1400-1415
S3931	Ginsenoside Rd	Ginsenoside Rd (Panaxoside Rd, Sanchinoside Rd), a minor ginseng saponin, has several pharmacological activities such as immunosuppressive activity, anti-inflammatory activity, immunological adjuvant, anti-cancer activity and wound-healing activity. Ginsenoside Rd inhibits TNFα-induced NF-κB transcriptional activity with an IC50 of 12.05±0.82 μM in HepG2 cells. Ginsenoside Rd inhibits expression of COX-2 and iNOS mRNA. Ginsenoside Rd also inhibits Ca2+ influx. Ginsenoside Rd inhibits CYP2D6, CYP1A2, CYP3A4, and CYP2C9, with IC50s of 58.0±4.5 μM, 78.4±5.3 μM, 81.7±2.6 μM, and 85.1±9.1 μM, respectively.	Drug Des Devel Ther, 2022, 16:2767-2782 J Ginseng Res, 2022, 46(5):700-709 J Ethnopharmacol, 2021, S0378-8741(21)00169-0
S3174	L-Arginine HCl (L-Arg)	L-Arginine(L-Arg,(S)-(+)-Arginine hydrochloride) is the nitrogen donor for synthesis of nitric oxide, a potent vasodilator that is deficient during times of sickle cell crisis.L-Arginine HCl (L-Arg) can be used to induce animal models of Acute Pancreatitis.	J Immunother Cancer, 2024, 12(11)e009805 Am J Cancer Res, 2021, 11(2):590-617 J Cell Mol Med, 2018, 10.1111/jcmm.13532
S3924	Ginsenoside Rb1	Ginsenoside Rb1 (Gypenoside Ⅲ) is a protopanaxadiol that has diverse in vitro and in vivo effects, including neuroprotective, anti-inflammatory, and anti-obesity actions. Ginsenoside Rb1, a main constituent of the root of Panax ginseng, inhibits Na+, K+-ATPase activity with IC50 of 6.3±1.0 μM. Ginsenoside also inhibits IRAK-1 activation and phosphorylation of NF-κB p65. Ginsenoside Rb1 reduces the expressions of TLR3, TLR4 and TRAF-6, and down-regulates the levels of TNF-α, IFN-β and iNOS.	J Biol Chem, 2024, 300(8):107542 J Ethnopharmacol, 2021, S0378-8741(21)00169-0 J Biol Chem, 2021, S0021-9258(21)00790-0
S2979	CU-T12-9	CU-T12-9 is a specific agonist of Toll-like receptor (TLR) 1/2 with EC50 of 52.9 nM in HEK-Blue hTLR2 SEAP assay. CU-T12-9 activates both the innate and the adaptive immune systems. CU-T12-9 signals through NF-κB and invokes an elevation of the downstream effectors TNF-α, IL-10, and iNOS.	Nat Commun, 2025, 16(1):2743 Biomedicine & Pharmacotherapy, 2023, 114638 Biomed Pharmacother, 2023, 162:114638
S7920	L-NMMA acetate	L-NMMA acetate (Tilarginine Acetate, Methylarginine acetate, NG-Monomethyl-L-arginine acetate, L-NG-monomethyl Arginine acetate) is an acetate salt form of L-NMMA. L-NMMA is a nitric oxide synthase(NOS) inhibitor with an IC50 of 4.1 μM for nNOS.	Stem Cell Res Ther, 2024, 15(1):366 Spectrochim Acta A Mol Biomol Spectrosc, 2022, 277:121280
S5640	Ethyl caffeate	Ethyl caffeate, a naturally occurring compound found in Bidens pilosa, suppresses NF-kappaB activation and its downstream inflammatory mediators, iNOS, COX-2 and PGE2 in vitro.	Int J Mol Sci, 2023, 24(12)9997
S6962	TPEN	TPEN (TPEDA) is a specific cell-permeable heavy metal chelator that induces apoptosis in NB4 cells via negatively regulating intracellular NO and Zn²⁺ signaling. TPEN (TPEDA) may be a potential therapeutic strategy for APL (acute promyelocytic leukemia).TPEN induces DNA damage and increases intracellular ROS production and also inhibits cell proliferation.	J Cachexia Sarcopenia Muscle, 2025, 16(2):e13771 Biomaterials, 2021, 271:120720
S9374	2',5'-Dihydroxyacetophenone	2',5'-Dihydroxyacetophenone (DHAP, 2-Acetylhydroquinone, Quinacetophenone) is a mixture of dihydroxyacetophenone isomers is used in food flavouring. 2',5'-Dihydroxyacetophenone significantly inhibits NO production via the suppression of iNOS expression. 2',5'-Dihydroxyacetophenone significantly decreases levels of the pro-inflammatory cytokines TNF-α and IL-6 by blocking the ERK1/2 and NF-κB signaling pathways.	Pathol Oncol Res, 2019, 25(1):301-309
S9502	Madecassic acid	Madecassic acid (Brahmic acid), a natural triterpene first isolated from C. asiatica, has diverse anti-inflammatory and anti-diabetic effects, blocking NF-κB activation in macrophages and causing by iNOS, COX-2, TNF-alpha, IL-1beta and IL-6 inhibition.	Drug Des Devel Ther, 2022, 16:3793-3804
F0177	iNOS Rabbit mAb	iNOS,iNOS/NOS Type II
F0354^New	Phospho-eNOS (Ser1177) Rabbit mAb	eNOS (phospho S1177),eNOS (pS1177),Phospho-eNOS (Ser1177)
F0615^New	nNOS Rabbit mAb	Nitric Oxide Synthase I,nNOS,nNOS/NOS,NOS1
F2190^New	nNOS (neuronal) Rabbit mAb	Nitric Oxide Synthase I,nNOS,nNOS/NOS,NOS1
S9208	Ginsenoside Rb3	Ginsenoside Rb3, extracted from the plant Panax ginseng, plays important roles in cardiovascular diseases, including myocardial ischemia-reperfusion (I/R) injury. Ginsenoside Rb3 (0.1-10 μM) is tested for inhibition of tumor necrosis factor-α (TNF)-induced nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) luciferase reporter activity using a human kidney 293T cell-based assay. Ginsenoside Rb3 shows the significant activity with an IC50 of 8.2 μM. Ginsenoside Rb3 also inhibits the induction of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) messenger Ribonucleic acid (mRNA) in a dose-dependent manner after HepG2 cells have been treated with TNF-α (10 ng/mL).	Chin Med, 2024, 19(1):70
S0924	Pteryxin	Pteryxin ((+)-Pteryxin), a dihydropyranocoumarin derivative found in Apiaceae family, is a potent inhibitor of butyrylcholinesterase (BChE) with IC50 of 12.96 μg/ml. Pteryxin inhibits LPS-induced nitric oxide production in mouse peritoneal macrophages with IC50 of 20 µM. Pteryxin is potential for Alzheimer's disease (AD) treatment.
S5671	Amcinonide	Amcinonide (Cyclocort, CL-34699) is an inhibitor of nitric oxide (NO) release from activated microglia with IC50 of 3.38 nM.
E0496	ZLc002	ZLc-002 is a selective inhibitor of nNOS-Capon coupling. ZLc-002 suppresses inflammatory nociception and chemotherapy-induced neuropathic pain.
S5577	6-Biopterin	6-Biopterin ( L-Biopterin, L-Erythro-Biopterin) is a natural product that has been considered as a growth factor for some insects.
E4805	Methylene Blue trihydrate	Methylene blue trihydrate (C.I. Basic Blue 9 trihydrate) acts as an inhibitor of soluble guanylyl cyclase (sGC), monoamine oxidase A (MAO-A) and NO synthase (NOS). Methylene blue trihydrate exhibits antimalarial, antidepressant, and anxiolytic activity effects. Methylene Blue trihydrate has potential applications in treating methemoglobinemia, neurodegenerative disorders, and ifosfamide-induced encephalopathy.
E5776^New	Asymmetric dimethylarginine	Asymmetric dimethylarginine is an endogenous inhibitor of nitric oxide synthase (NOS). It also functions as a marker of endothelial dysfunction in several pathological states.
S9029	Prim-o-glucosylcimifugin	Prim-O-glucosylcimifugin (Cimifugin beta-D-glucopyranoside, Cimifugin 7-glucoside) is a major constituent in Radix Saposhnikovia that has been long used for the treatment of pyrexia, rheumatism, and cancer in traditional Chinese medicine. It shows potential anticancer activity. Prim-O-glucosylcimifugin downregulates the mRNA and protein expression inducible NO synthase (iNOS) and cyclooxygenase 2 (COX-2) in LPS-activated RAW 264.7 macrophages in a concentration-dependent manner.
S3292	(3R,8S)-Falcarindiol	Falcarindiol (FAD, (3R,8S)-Falcarindiol, FaDOH) is a natural polyacetylene compound found rich in many plants of the Umbelliferae family. Falcarindiol suppresses LPS-stimulated expression of inducible nitric oxide synthase (iNOS), tumor necrosis factor alpha (TNFα), interleukin-6 (IL-6), and interleukin-1 beta (IL-1β). Falcarindiol attenuates the LPS-induced activation of JNK, ERK, STAT1, and STAT3 signaling molecules.	Antioxidants (Basel), 2024, 13(12)1533 Front Cell Infect Microbiol, 2023, 13:1128000 Front Pharmacol, 2021, 12:656697
S6850	NE 52-QQ57	NE 52-QQ57 is a selective, and orally available antagonist of G-protein coupled receptor 4 (GPR4) with IC50 of 0.07 μM. NE 52-QQ57 effectively blocks GPR4-mediated cAMP accumulation with IC50 of 26.8 nM in HEK293 cells. The antagonism of GPR4 with NE 52-QQ57 significantly inhibits the AGE-induced increased expression of several key inflammatory cytokines and signaling molecules, including tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, IL-6, inducible nitric oxide synthase (iNOS), nitric oxide (NO), cyclooxygenase 2 (COX2), and prostaglandin E2 (PGE2).	Exp Hematol Oncol, 2024, 13(1):13
E4037	L-Canavanine sulfate	L-Canavanine sulfate is a selective inhibitor of inducible NO synthase. L-Canavanine sulfate exhibits IC50 values ranging from 5 to 10 mM in arginine-rich media and causes a limited degree of cytotoxicity in HeLa, Hep G2, and SK-HEP-1 cells.
S3589	Bendazol	Bendazol (2-Benzylbenzimidazole, Dibazol, Dibazole, Bendazole, Tromasedan) is a hypotensive drug that enhances NO synthase activity in renal glomeruli and collecting tubules. Bendazol inhibits the progression of form-deprivation myopia (FDM) and suppresses the upregulation of HIF-1α.
S3899	Hederagenin	Hederagenin (Caulosapogenin, Hederagenol, Hederagenic acid, Astrantiagenin E) is a highly water insoluble triterpenoid compound that can be found in various plants including Hedera helix and Chenopodium quinoa. It exhibits a variety of biological activities, including potent antitumor properties both in vitro and in vivo. Hederagenin inhibits LPS-stimulated expression of iNOS, COX-2, and NF-κB.
S3261	Myrislignan	Myrislignan, a lignan isolated from Myristica fragrans Houtt, possesses anti-inflammatory activities. Myrislignan inhibits interleukin-6 (IL-6) and tumour necrosis factor-α (TNF-α). Myrislignan significantly inhibits the expressions of inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2) dose-dependently in LPS-stimulated macrophage cells. Myrislignan inhibits the NF-κB signalling pathway activation.	Oxid Med Cell Longev, 2023, 2023:7098313
S3304	Stylopine	Stylopine ((R,S)-Stylopine, Tetrahydrocoptisine) reduces nitric oxide (NO), prostaglandin E2 (PGE2), tumor necrosis factor-alpha (TNF-alpha) and interleukin-1beta (IL-1beta), and the IL-6 production and cyclooxygenase-2 (COX-2) activity caused by the LPS stimulation. Stylopine is a major component of the leaf of Chelidonium majus L.
S5542	7-Nitroindazole	7-Nitroindazole, a heterocyclic compound, acts as a selective inhibitor for neuronal nitric oxide synthase showing a 10-fold selectivity for neuronal NOS.
S5229	Isosorbide dinitrate	Isosorbide Dinitrate (ISDN, Sorbide nitrate, Sorbidnitrate, Isordil, Nitrosorbide) is the dinitrate salt form of isosorbide, an organic nitrate with vasodilator activity. Isosorbide Dinitrate is a medication used for heart failure, esophageal spasms, and to treat and prevent chest pain from not enough blood flow to the heart. Isosorbide Dinitrate can converte to nitric oxide (NO), an active intermediate compound which activates the enzyme guanylate cyclase (atrial natriuretic peptide receptor A).
S8639	DPI (Diphenyleneiodonium chloride)	DPI (Diphenyleneiodonium chloride) is an inhibitor of NADPH oxidase and also a potent, irreversible, and time-, temperature-dependent iNOS/eNOS inhibitor. Diphenyleneiodonium chloride (DPI) also functions as a TRPA1 activator and selectively inhibits intracellular reactive oxygen species (ROS).	Redox Biol, 2025, 80:103485 Exp Mol Med, 2024, 56(12):2602-2616 Phytomedicine, 2024, 136:156283
S2877	L-NAME HCl	L-NAME HCl (NG-Nitroarginine methyl ester, N-Nitro-L-arginine methylester) is a nonselective inhibitor of nitric oxide synthetases (NOS) for nNOS (bovine), eNOS (human), and iNOS (murine), with K_i of 15 nM, 39 nM and 4.4 μM, respectively. L-NAME HCl can be used to induce animal models of Hypertension.	Commun Biol, 2025, 8(1):201 Nat Neurosci, 2024, 10.1038/s41593-024-01604-8 J Cell Mol Med, 2024, 28(21):e70203
S8337	1400W 2HCl	1400W (N-(3-(Aminomethyl)benzyl)acetamidine) is a slow, tight binding, and highly selective inhibitor of inducible nitric-oxide synthase(iNOS).	Nat Commun, 2025, 16(1):3570 Biomolecules, 2025, 15(1)125 Nat Commun, 2024, 15(1):2698
S4548	Aminoguanidine hydrochloride	Aminoguanidine (Pimagedine, Guanyl hydrazine, Hydrazinecarboximidamide, Imino semicarbazide, Monoaminoguanidine) is a diamine oxidase and nitric oxide synthase inhibitor. It acts to reduce levels of advanced glycation end products (AGEs) through interacting with 3-deoxyglucosone.	Anim Biotechnol, 2021, 1-10 Anim Biotechnol, 2021, 1-8 Am J Cancer Res, 2020, 10(5):1400-1415
S3931	Ginsenoside Rd	Ginsenoside Rd (Panaxoside Rd, Sanchinoside Rd), a minor ginseng saponin, has several pharmacological activities such as immunosuppressive activity, anti-inflammatory activity, immunological adjuvant, anti-cancer activity and wound-healing activity. Ginsenoside Rd inhibits TNFα-induced NF-κB transcriptional activity with an IC50 of 12.05±0.82 μM in HepG2 cells. Ginsenoside Rd inhibits expression of COX-2 and iNOS mRNA. Ginsenoside Rd also inhibits Ca2+ influx. Ginsenoside Rd inhibits CYP2D6, CYP1A2, CYP3A4, and CYP2C9, with IC50s of 58.0±4.5 μM, 78.4±5.3 μM, 81.7±2.6 μM, and 85.1±9.1 μM, respectively.	Drug Des Devel Ther, 2022, 16:2767-2782 J Ginseng Res, 2022, 46(5):700-709 J Ethnopharmacol, 2021, S0378-8741(21)00169-0
S3924	Ginsenoside Rb1	Ginsenoside Rb1 (Gypenoside Ⅲ) is a protopanaxadiol that has diverse in vitro and in vivo effects, including neuroprotective, anti-inflammatory, and anti-obesity actions. Ginsenoside Rb1, a main constituent of the root of Panax ginseng, inhibits Na+, K+-ATPase activity with IC50 of 6.3±1.0 μM. Ginsenoside also inhibits IRAK-1 activation and phosphorylation of NF-κB p65. Ginsenoside Rb1 reduces the expressions of TLR3, TLR4 and TRAF-6, and down-regulates the levels of TNF-α, IFN-β and iNOS.	J Biol Chem, 2024, 300(8):107542 J Ethnopharmacol, 2021, S0378-8741(21)00169-0 J Biol Chem, 2021, S0021-9258(21)00790-0
S7920	L-NMMA acetate	L-NMMA acetate (Tilarginine Acetate, Methylarginine acetate, NG-Monomethyl-L-arginine acetate, L-NG-monomethyl Arginine acetate) is an acetate salt form of L-NMMA. L-NMMA is a nitric oxide synthase(NOS) inhibitor with an IC50 of 4.1 μM for nNOS.	Stem Cell Res Ther, 2024, 15(1):366 Spectrochim Acta A Mol Biomol Spectrosc, 2022, 277:121280
S5640	Ethyl caffeate	Ethyl caffeate, a naturally occurring compound found in Bidens pilosa, suppresses NF-kappaB activation and its downstream inflammatory mediators, iNOS, COX-2 and PGE2 in vitro.	Int J Mol Sci, 2023, 24(12)9997
S9374	2',5'-Dihydroxyacetophenone	2',5'-Dihydroxyacetophenone (DHAP, 2-Acetylhydroquinone, Quinacetophenone) is a mixture of dihydroxyacetophenone isomers is used in food flavouring. 2',5'-Dihydroxyacetophenone significantly inhibits NO production via the suppression of iNOS expression. 2',5'-Dihydroxyacetophenone significantly decreases levels of the pro-inflammatory cytokines TNF-α and IL-6 by blocking the ERK1/2 and NF-κB signaling pathways.	Pathol Oncol Res, 2019, 25(1):301-309
S9502	Madecassic acid	Madecassic acid (Brahmic acid), a natural triterpene first isolated from C. asiatica, has diverse anti-inflammatory and anti-diabetic effects, blocking NF-κB activation in macrophages and causing by iNOS, COX-2, TNF-alpha, IL-1beta and IL-6 inhibition.	Drug Des Devel Ther, 2022, 16:3793-3804
S9208	Ginsenoside Rb3	Ginsenoside Rb3, extracted from the plant Panax ginseng, plays important roles in cardiovascular diseases, including myocardial ischemia-reperfusion (I/R) injury. Ginsenoside Rb3 (0.1-10 μM) is tested for inhibition of tumor necrosis factor-α (TNF)-induced nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) luciferase reporter activity using a human kidney 293T cell-based assay. Ginsenoside Rb3 shows the significant activity with an IC50 of 8.2 μM. Ginsenoside Rb3 also inhibits the induction of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) messenger Ribonucleic acid (mRNA) in a dose-dependent manner after HepG2 cells have been treated with TNF-α (10 ng/mL).	Chin Med, 2024, 19(1):70
S0924	Pteryxin	Pteryxin ((+)-Pteryxin), a dihydropyranocoumarin derivative found in Apiaceae family, is a potent inhibitor of butyrylcholinesterase (BChE) with IC50 of 12.96 μg/ml. Pteryxin inhibits LPS-induced nitric oxide production in mouse peritoneal macrophages with IC50 of 20 µM. Pteryxin is potential for Alzheimer's disease (AD) treatment.
S5671	Amcinonide	Amcinonide (Cyclocort, CL-34699) is an inhibitor of nitric oxide (NO) release from activated microglia with IC50 of 3.38 nM.
E0496	ZLc002	ZLc-002 is a selective inhibitor of nNOS-Capon coupling. ZLc-002 suppresses inflammatory nociception and chemotherapy-induced neuropathic pain.
E4805	Methylene Blue trihydrate	Methylene blue trihydrate (C.I. Basic Blue 9 trihydrate) acts as an inhibitor of soluble guanylyl cyclase (sGC), monoamine oxidase A (MAO-A) and NO synthase (NOS). Methylene blue trihydrate exhibits antimalarial, antidepressant, and anxiolytic activity effects. Methylene Blue trihydrate has potential applications in treating methemoglobinemia, neurodegenerative disorders, and ifosfamide-induced encephalopathy.
E5776^New	Asymmetric dimethylarginine	Asymmetric dimethylarginine is an endogenous inhibitor of nitric oxide synthase (NOS). It also functions as a marker of endothelial dysfunction in several pathological states.
S9029	Prim-o-glucosylcimifugin	Prim-O-glucosylcimifugin (Cimifugin beta-D-glucopyranoside, Cimifugin 7-glucoside) is a major constituent in Radix Saposhnikovia that has been long used for the treatment of pyrexia, rheumatism, and cancer in traditional Chinese medicine. It shows potential anticancer activity. Prim-O-glucosylcimifugin downregulates the mRNA and protein expression inducible NO synthase (iNOS) and cyclooxygenase 2 (COX-2) in LPS-activated RAW 264.7 macrophages in a concentration-dependent manner.
S3292	(3R,8S)-Falcarindiol	Falcarindiol (FAD, (3R,8S)-Falcarindiol, FaDOH) is a natural polyacetylene compound found rich in many plants of the Umbelliferae family. Falcarindiol suppresses LPS-stimulated expression of inducible nitric oxide synthase (iNOS), tumor necrosis factor alpha (TNFα), interleukin-6 (IL-6), and interleukin-1 beta (IL-1β). Falcarindiol attenuates the LPS-induced activation of JNK, ERK, STAT1, and STAT3 signaling molecules.	Antioxidants (Basel), 2024, 13(12)1533 Front Cell Infect Microbiol, 2023, 13:1128000 Front Pharmacol, 2021, 12:656697
S6850	NE 52-QQ57	NE 52-QQ57 is a selective, and orally available antagonist of G-protein coupled receptor 4 (GPR4) with IC50 of 0.07 μM. NE 52-QQ57 effectively blocks GPR4-mediated cAMP accumulation with IC50 of 26.8 nM in HEK293 cells. The antagonism of GPR4 with NE 52-QQ57 significantly inhibits the AGE-induced increased expression of several key inflammatory cytokines and signaling molecules, including tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, IL-6, inducible nitric oxide synthase (iNOS), nitric oxide (NO), cyclooxygenase 2 (COX2), and prostaglandin E2 (PGE2).	Exp Hematol Oncol, 2024, 13(1):13
E4037	L-Canavanine sulfate	L-Canavanine sulfate is a selective inhibitor of inducible NO synthase. L-Canavanine sulfate exhibits IC50 values ranging from 5 to 10 mM in arginine-rich media and causes a limited degree of cytotoxicity in HeLa, Hep G2, and SK-HEP-1 cells.
S3899	Hederagenin	Hederagenin (Caulosapogenin, Hederagenol, Hederagenic acid, Astrantiagenin E) is a highly water insoluble triterpenoid compound that can be found in various plants including Hedera helix and Chenopodium quinoa. It exhibits a variety of biological activities, including potent antitumor properties both in vitro and in vivo. Hederagenin inhibits LPS-stimulated expression of iNOS, COX-2, and NF-κB.
S3261	Myrislignan	Myrislignan, a lignan isolated from Myristica fragrans Houtt, possesses anti-inflammatory activities. Myrislignan inhibits interleukin-6 (IL-6) and tumour necrosis factor-α (TNF-α). Myrislignan significantly inhibits the expressions of inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2) dose-dependently in LPS-stimulated macrophage cells. Myrislignan inhibits the NF-κB signalling pathway activation.	Oxid Med Cell Longev, 2023, 2023:7098313
S3304	Stylopine	Stylopine ((R,S)-Stylopine, Tetrahydrocoptisine) reduces nitric oxide (NO), prostaglandin E2 (PGE2), tumor necrosis factor-alpha (TNF-alpha) and interleukin-1beta (IL-1beta), and the IL-6 production and cyclooxygenase-2 (COX-2) activity caused by the LPS stimulation. Stylopine is a major component of the leaf of Chelidonium majus L.
S5542	7-Nitroindazole	7-Nitroindazole, a heterocyclic compound, acts as a selective inhibitor for neuronal nitric oxide synthase showing a 10-fold selectivity for neuronal NOS.
S2979	CU-T12-9	CU-T12-9 is a specific agonist of Toll-like receptor (TLR) 1/2 with EC50 of 52.9 nM in HEK-Blue hTLR2 SEAP assay. CU-T12-9 activates both the innate and the adaptive immune systems. CU-T12-9 signals through NF-κB and invokes an elevation of the downstream effectors TNF-α, IL-10, and iNOS.	Nat Commun, 2025, 16(1):2743 Biomedicine & Pharmacotherapy, 2023, 114638 Biomed Pharmacother, 2023, 162:114638
S3589	Bendazol	Bendazol (2-Benzylbenzimidazole, Dibazol, Dibazole, Bendazole, Tromasedan) is a hypotensive drug that enhances NO synthase activity in renal glomeruli and collecting tubules. Bendazol inhibits the progression of form-deprivation myopia (FDM) and suppresses the upregulation of HIF-1α.
S5229	Isosorbide dinitrate	Isosorbide Dinitrate (ISDN, Sorbide nitrate, Sorbidnitrate, Isordil, Nitrosorbide) is the dinitrate salt form of isosorbide, an organic nitrate with vasodilator activity. Isosorbide Dinitrate is a medication used for heart failure, esophageal spasms, and to treat and prevent chest pain from not enough blood flow to the heart. Isosorbide Dinitrate can converte to nitric oxide (NO), an active intermediate compound which activates the enzyme guanylate cyclase (atrial natriuretic peptide receptor A).
S6962	TPEN	TPEN (TPEDA) is a specific cell-permeable heavy metal chelator that induces apoptosis in NB4 cells via negatively regulating intracellular NO and Zn²⁺ signaling. TPEN (TPEDA) may be a potential therapeutic strategy for APL (acute promyelocytic leukemia).TPEN induces DNA damage and increases intracellular ROS production and also inhibits cell proliferation.	J Cachexia Sarcopenia Muscle, 2025, 16(2):e13771 Biomaterials, 2021, 271:120720
F0354^New	Phospho-eNOS (Ser1177) Rabbit mAb	eNOS (phospho S1177),eNOS (pS1177),Phospho-eNOS (Ser1177)
F0615^New	nNOS Rabbit mAb	Nitric Oxide Synthase I,nNOS,nNOS/NOS,NOS1
F2190^New	nNOS (neuronal) Rabbit mAb	Nitric Oxide Synthase I,nNOS,nNOS/NOS,NOS1
E5776^New	Asymmetric dimethylarginine	Asymmetric dimethylarginine is an endogenous inhibitor of nitric oxide synthase (NOS). It also functions as a marker of endothelial dysfunction in several pathological states.

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