The molecule is an epothilone that is 1-oxacyclohexadec-13-ene-2,6-dione which is substituted by hydroxy groups at positions 4 and 9, methyl groups at positions 5, 5, 7, and 9, and by a (1E)-1-(2-methyl-1,3-thiazol-4-yl)prop-1-en-2-yl group at position 16 (the 4S,7R,8S,9S,13Z,16S stereoisomer).
(4S,7R,8S,9S,13Z,16S)-4,8-dihydroxy-5,5,7,9-tetramethyl-16-[(E)-1-(2-methyl-1,3-thiazol-4-yl)prop-1-en-2-yl]-1-oxacyclohexadec-13-ene-2,6-dione