Name: Samotolisib (LY3023414)
Brand: Selleck Chemicals
SKU: S8322
Availability: InStock
Rating: 5 (16 reviews)

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Quality Control

Batch: Purity: 99.71%

99.71

Related Targets	Akt mTOR GSK-3 ATM/ATR DNA-PK AMPK PDPK1 PTEN PI4K PP2A
Other PI3K Inhibitors	GDC-0077 (Inavolisib) SAR405 Quercetin (Sophoretin) LY294002 XL147 analogue Tersolisib (STX-478) Buparlisib (BKM120) 740 Y-P (PDGFR 740Y-P) GO-203 TFA Eganelisib (IPI-549)

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Activity Description	PMID
KB-8-5-11	qHTS assay	P-glycoprotein substrates identified in KB-8-5-11 adenocarcinoma cell line, qHTS therapeutic library screen, Potency=0.6513μM.	31515284
KB-3-1	qHTS assay	P-glycoprotein substrates identified in KB-3-1 adenocarcinoma cell line, qHTS therapeutic library screen.	31515284
Click to View More Cell Line Experimental Data

Solubility

In vitro
Batch:

DMSO : 81 mg/mL (199.27 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 6 mg/mL

Water : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	4.000mg/ml (9.84mM)	Taking the 1 mL working solution as an example, add 50 μL of 80 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	1.000mg/ml (2.46mM)	Taking the 1 mL working solution as an example, add 50 μL of 20 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

Dosage: mg/kg

Average weight of animals: g

Dosing volume per animal: μL

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Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

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Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Chemical Information, Storage & Stability

Molecular Weight	406.48	Formula	C₂₃H₂₆N₄O₃	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	1386874-06-1	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	GTPL8918			SMILES	CC(CN1C2=C3C=C(C=CC3=NC=C2N(C1=O)C)C4=CC(=CN=C4)C(C)(C)O)OC

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

Targets/IC₅₀/Ki	class I PI3K isoforms mTOR kinase DNA-PK
In vitro	Samotolisib (LY3023414) shows high solubility across a wide pH range. In vitro, inhibition of PI3K/AKT/mTOR signaling by this compound causes G1 cell-cycle arrest and resulted in broad antiproliferative activity in cancer cell panel screens. In cell-based assays, its inhibition of PI3K and mTOR is assessed in the PTEN-deficient U87 MG glioblastoma cell line. It inhibits the phosphorylation of AKT at position T308 downstream of PI3K at an IC50 of 106 nM. Similarly, it inhibits phosphorylation of AKT at position S473 (IC50 = 94.2 nM) by mTORC2 as well as phosphorylation of mTORC1 kinase targets p70S6K (position T389; IC50 =10.6 nM) and 4E-BP1 (positions T37/46; IC50 = 187 nM). The downstream phosphorylation of S6RP at positions pS240/244 (IC50 = 19.1 nM) by p70S6K was inhibited as well, indicating target inhibition along the entire PI3K/AKT/mTOR pathway by this compound.
In vivo	Samotolisib (LY3023414) demonstrates high bioavailability and dose-dependent dephosphorylation of PI3K/AKT/mTOR pathway downstream substrates such as AKT, S6K, S6RP, and 4E-BP1 for 4 to 6 hours in vivo, reflecting the drug's half-life of 2 hours. Intermittent target inhibition is sufficient for its antitumor activity. This compound shows time- and dose-dependent target inhibition in vivo. It is currently being evaluated in phase 1 and 2 trials for the treatment of human malignancies.
References	[1] https://pubmed.ncbi.nlm.nih.gov/27439478/

Applications

Methods	Biomarkers	Images	PMID
Western blot	p-mTOR / mTOR / ATG5 / Beclin-1 / p62 pS6K1 / S6K1 / pAKT-S473 / AKT1 / pERK / ERK		29228741
Growth inhibition assay	Cell viability		29228741

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2026-06-22)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT03675893	RECRUITING	Endometrial Cancer	Dana-Farber Cancer Institute	2018-12-24	PHASE2
NCT03155620	ACTIVE_NOT_RECRUITING	Advanced Malignant Solid Neoplasm; Ann Arbor Stage III Non-Hodgkin Lymphoma; Ann Arbor Stage IV Non-Hodgkin Lymphoma; Histiocytic Sarcoma; Juvenile Xanthogranuloma; Langerhans Cell Histiocytosis; Malignant Glioma; Recurrent Childhood Rhabdomyosarcoma; Recurrent Ependymoma; Recurrent Ewing Sarcoma; Recurrent Glioma; Recurrent Hepatoblastoma; Recurrent Langerhans Cell Histiocytosis; Recurrent Malignant Germ Cell Tumor; Recurrent Malignant Solid Neoplasm; Recurrent Medulloblastoma; Recurrent Neuroblastoma; Recurrent Non-Hodgkin Lymphoma; Recurrent Osteosarcoma; Recurrent Peripheral Primitive Neuroectodermal Tumor; Recurrent Primary Central Nervous System Neoplasm; Recurrent Rhabdoid Tumor; Recurrent Soft Tissue Sarcoma; Refractory Ewing Sarcoma; Refractory Glioma; Refractory Hepatoblastoma; Refractory Langerhans Cell Histiocytosis; Refractory Malignant Germ Cell Tumor; Refractory Malignant Solid Neoplasm; Refractory Medulloblastoma; Refractory Neuroblastoma; Refractory Non-Hodgkin Lymphoma; Refractory Osteosarcoma; Refractory Peripheral Primitive Neuroectodermal Tumor; Refractory Primary Central Nervous System Neoplasm; Refractory Rhabdoid Tumor; Refractory Rhabdomyosarcoma; Rhabdoid Tumor; Stage III Osteosarcoma AJCC v7; Stage III Soft Tissue Sarcoma AJCC v7; Stage IV Osteosarcoma AJCC v7; Stage IV Soft Tissue Sarcoma AJCC v7; Stage IVA Osteosarcoma AJCC v7; Stage IVB Osteosarcoma AJCC v7; Wilms Tumor	National Cancer Institute (NCI)	2017-07-31	PHASE2
NCT03213678	COMPLETED	Advanced Malignant Solid Neoplasm; Ann Arbor Stage III Non-Hodgkin Lymphoma; Ann Arbor Stage IV Non-Hodgkin Lymphoma; Malignant Glioma; Recurrent Ependymoma; Recurrent Ewing Sarcoma; Recurrent Glioma; Recurrent Hepatoblastoma; Recurrent Langerhans Cell Histiocytosis; Recurrent Malignant Germ Cell Tumor; Recurrent Malignant Solid Neoplasm; Recurrent Medulloblastoma; Recurrent Neuroblastoma; Recurrent Non-Hodgkin Lymphoma; Recurrent Osteosarcoma; Recurrent Peripheral Primitive Neuroectodermal Tumor; Recurrent Primary Central Nervous System Neoplasm; Recurrent Rhabdomyosarcoma; Recurrent Soft Tissue Sarcoma; Refractory Langerhans Cell Histiocytosis; Refractory Malignant Germ Cell Tumor; Refractory Malignant Solid Neoplasm; Refractory Neuroblastoma; Refractory Non-Hodgkin Lymphoma; Refractory Primary Central Nervous System Neoplasm; Rhabdoid Tumor; Stage III Osteosarcoma AJCC v7; Stage III Soft Tissue Sarcoma AJCC v7; Stage IV Osteosarcoma AJCC v7; Stage IV Soft Tissue Sarcoma AJCC v7; Stage IVA Osteosarcoma AJCC v7; Stage IVB Osteosarcoma AJCC v7; Wilms Tumor	National Cancer Institute (NCI)	2017-11-28	PHASE2
NCT04032080	COMPLETED	Triple Negative Breast Cancer	Baylor Research Institute	2019-09-05	PHASE2
NCT02549989	COMPLETED	Endometrial Cancer; Recurrent Endometrial Cancer	Memorial Sloan Kettering Cancer Center	2015-09	PHASE2
NCT02057133	ACTIVE_NOT_RECRUITING	Breast Neoplasms	Eli Lilly and Company	2014-03-10	PHASE1

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Samotolisib (LY3023414) PI3K inhibitor

Chemical Structure

Molecular Weight: 406.48