21-Aminoepothilone B 280578-49-6 4,17-Dioxabicyclo(14.1.0)heptadecane-5,9-dione, 3-((1E)-2-(2-(aminomethyl)-4-thiazolyl)-1-methylethenyl)-7,11-dihydroxy-8,8,10,12,16-pentamethyl-, (1S,3S,7S,10R,11S,12S,16R)- BMS-310705