4-thiazolyl
Oxacyclohexadec-13-ene-2,6-dione,16-[(1Z)-1-chloro-2-(2-methyl-4-thiazolyl)ethenyl]-7-ethyl-4,8-dihydroxy-5,5,9,13-tetramethyl-, (4S,7R,8S,9S,13Z,16S)-
Oxacyclohexadec-13-ene-2,6-dione,13-(1,3-dithiolan-2-ylmethyl)-4,8-dihydroxy-16-[(1E)-2-[2-(hydroxymethyl)-4-thiazolyl]-1-methylethenyl]-5,5,7,9-tetramethyl-,(4S,7R,8S,9S,13E,16S)-