10mM in DMSO for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Store at -80°C Ships Dry ice packs + Cold packs Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 1 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Information
R406 R406 is a potent Syk inhibitor with IC50 of 41 nM in cell-free assays, strongly inhibits Syk but not Lyn, 5-fold less potent to Flt3. R406 induces apoptosis . Phase 1.
In vitro
R406 is a potent inhibitor of immunoglobulin E (IgE)- and IgG-mediated activation of Fc receptor signaling. R406 inhibits the anti-IgE-induced production and release of LTC4 and cytokines and chemokines, including TNFα, IL-8, and GM-CSF. R406 inhibits phosphorylation of Syk substrate linker for activation of T cells in mast cells and B-cell linker protein/SLP65 in B cells. R406 binds to the ATP binding pocket of Syk and inhibits its kinase activity as an ATP-competitive inhibitor with Ki of 30 nM. R406 blocks Syk-dependent FcR-mediated activation of monocytes/macrophages and neutrophils and Bcr-mediated activation of B lymphocytes. R406 significantly induces chronic lymphocytic leukemia (CLL) cell apoptosis in nurselike cells cocultures and blocks CCL3 and CCL4 secretion by CLL cells in response to B-cell antigen receptor (Bcr) triggering. R406 is a potent inhibitor of platelet signaling and functions initiated by FcγRIIA cross-linking by specific antibodies or by sera from HIT patients.
In vivo
R406 reduces cutaneous reverse passive Arthus reaction by approximately 86% at 5 mg/kg in prophylactic treated mice. R406 also shows efficacy in inhibiting paw inflammation in antibody-induced arthritis mouse models. R406 does not adversely affect macrophage or neutrophil function in innate immune responses and has minimal functional immunotoxicity notwithstanding its lymphocytopenic effect.
Cell Data
cell lines：
Concentrations：
Incubation Time：
Powder Purity:≥97%
| Isomeric SMILES | CC1(C(=O)NC2=C(O1)C=CC(=N2)NC3=NC(=NC=C3F)NC4=CC(=C(C(=C4)OC)OC)OC)C.C1=CC=C(C=C1)S(=O)(=O)O |
|---|---|
| PubChem CID | 11984591 |
| Molecular Weight | 628.63 |
Comprehensive hazard, handling, storage, and regulatory compliance document.
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View spec sheet →| 1. Guo Jiajie, Qiu Qiujing, Yan Xiaoyuan, Zhang Zeying, Zhang Xiyue, An Na, Yin Chengcheng, Yang Di, Okamura Hirohiko, Yoshida Kaya, Sun Hongchen, Qiu Lihong. (2026) Porphyromonas gingivalis-derived extracellular vesicles aggravate bone destruction in rheumatoid arthritis by promoting Syk-dependent osteoclastogenesis. International Journal of Oral Science, 18 (1): (6). [PMID:41639593] [10.1038/s41368-025-00416-1] |
