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SX-682 CXCR inhibitor

Cat.No.S8947

SX-682 is an orally bioavailable small-molecule allosteric inhibitor of CXCR1 and CXCR2 that blocks tumor MDSC recruitment and enhances T cell activation and antitumor immunity.
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Quality Control

Batch: S894701 DMSO]93 mg/mL]false]Ethanol]93 mg/mL]false]Water]˂1 mg/mL]false Purity: 98.66%
98.66

Solubility

In vitro
Batch:

DMSO : 93 mg/mL (199.05 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 93 mg/mL

Water : ˂1 mg/mL

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In vivo
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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.

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Chemical Information, Storage & Stability

Molecular Weight 467.20 Formula

C19H14BF4N3O4S

Storage (From the date of receipt) 3 years -20°C powder
CAS No. 1648843-04-2 -- Storage of Stock Solutions

Synonyms N/A SMILES B(C1=C(C=C(C=C1)OC(F)(F)F)CSC2=NC=C(C=N2)C(=O)NC3=CC=C(C=C3)F)(O)O

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Mechanism of Action

Targets/IC50/Ki
CXCR1
CXCR2
In vivo

Whole tumor accumulation of CXCL1 in vivo in MOC1 and LLC tumors is significantly greater than oral mucosa and normal lung, respectively, and not diminished with SX-682 treatment. Plasma accumulation of CXCL1 is greater in tumor-bearing mice compared with naive for both models and increases following this compound treatment. Treatment of mice bearing MOC1 or LLC tumors with this chemical beginning 10 or 20 days after tumor initiation does not alter CXCR1 or CXCR2 expression on tumor cells in vivo. Following in vivo this compound treatment, tumor PMN-MDSC expression of cell surface TGF-β or superoxide dismutase 1/2 genes, responsible for the generation of H2O2, is not significantly altered.

References

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2026-09-04)

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT07667400 NOT_YET_RECRUITING
Head and Neck Cancer; Head and Neck Squamous Cell Carcinoma; Paranasal Sinus Neoplasms; Nasopharyngeal Carcinoma; Oropharyngeal Squamous Cell Carcinoma; Hypopharyngeal Cancer; Carcinoma of Larynx; Oral Squamous Cell Carcinoma; Salivary Gland Cancer; Adenoid Cystic Carcinoma; Prostate Cancer; Metastatic Castration Resistant Prostate Cancer
National Cancer Institute (NCI)
2026-09-09 PHASE1; PHASE2
NCT07322341 RECRUITING
Advanced Lung Non-Small Cell Carcinoma; Metastatic Lung Non-Small Cell Carcinoma; Recurrent Lung Non-Small Cell Carcinoma; Stage III Lung Cancer AJCC v8; Stage IV Lung Cancer AJCC v8
University of Washington
2026-10-01 PHASE2
NCT07002320 RECRUITING
Metastatic Castrate-Resistant Prostate Cancer (mCRPC)
Institute of Cancer Research, United Kingdom
2025-04-28 PHASE1; PHASE2
NCT04245397 RECRUITING
Myelodysplastic Syndromes
Syntrix Biosystems, Inc.
2020-06-30 PHASE1
NCT06149481 RECRUITING
Metastatic Colorectal Cancer
National Cancer Institute (NCI)
2024-03-26 PHASE1; PHASE2
NCT05570825 RECRUITING
Metastatic Lung Non-Small Cell Carcinoma; Recurrent Lung Non-Small Cell Carcinoma; Stage IIIC Lung Cancer AJCC v8; Stage IV Lung Cancer AJCC v8
University of Washington
2023-04-06 PHASE2

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