Epothilone B

Epothilone B (Epo B) is a macrolide that causes the formation of bundles of intracellular microtubules in non-mitotic cells, induces the formation of hyperstable tubulin polymers, and arrests cell cycling in mitosis. It induces mitotic arrest at the G2-M transition in Hs578T and HeLa cells (IC50 = 3 and 32 nM, respectively) as well as in multidrug resistant KB3-1 and KBV-1 cells (IC50 = 16 and 92 nM, respectively). Epo B causes cell cycle arrest at nanomolar IC50 values in cell lines from ovarian, breast, lung, colon, prostate, and squamous cancer.Formal Name: 7S,11S-dihydroxy-8,8,10R,12S,16R-pentamethyl-3S-[(1E)-1S-methyl-2-(2-methyl-4-thiazolyl)ethenyl]-4,17-dioxabicyclo[14.1.0]heptadecane-5,9-dione. CAS Number: 152044-54-7. Synonyms: Epo B. Molecular Formula: C27H41NO6S. Formula Weight: 507.7. Purity: >95%. Formulation: (Request formulation change), A crystalline solid. Solubility: DMSO: 30 mg/ml, Ethanol: 30 mg/ml. lambdamax: 212, 250 nm. SMILES: CC1=NC(/C=C(C)/[C@@H](OC(C[C@H](O)C2(C)C)=O)C[C@@H]3O[C@]3(C)CCC[C@@](C)([H])[C@H](O)[C@@H](C)C2=O)=CS1. InChi Code: InChI=1S/C27H41NO6S/c1-15-9-8-10-27(7)22(34-27)12-20(16(2)11-19-14-35-18(4)28-19)33-23(30)13-21(29)26(5,6)25(32)17(3)24(15)31/h11,14-15,17,20-22,24,29,31H,8-10,12-13H2,1-7H3/b16-11+/t15-,17+,20-,21-,22-,24-,27+/m0/s1. InChi Key: QXRSDHAAWVKZLJ-PVYNADRNSA-N.