(1S,3S,7S,10R,11S,12S,16R)-3-[(E)-1-[2-(aminomethyl)-1,3-thiazol-4-yl]prop-1-en-2-yl]-7,11-dihydroxy-8,8,10,12,16-pentamethyl-4,17-dioxabicyclo[14.1.0]heptadecane-5,9-dione; 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); (1S,3S(E),7S,10R,11S,12S,16R)-3-[2-(2-aminomethyl-thiazol-4-yl)-1-methyl-vinyl]-7,11-dihydroxy-8,8,10,12,16-pentamethyl-4,17-dioxa-bicyclo[14.1.0]heptadecane-5,9-dione; 21-aminoepothilone B