(12Z,16E)-(3S,6S,7R,8S,15S)-3,7,15-Tris-(tert-butyl-dimethyl-silanyloxy)-4,4,6,8,12,16-hexamethyl-17-(2-methyl-thiazol-4-yl)-5-oxo-heptadeca-12,16-dienoic acid

(12Z,16E)-(3S,6S,7R,8S,15S)-3,7-Bis-(tert-butyl-dimethyl-silanyloxy)-15-hydroxy-4,4,6,8,12,16-hexamethyl-17-(2-methyl-thiazol-4-yl)-5-oxo-heptadeca-12,16-dienoic acid

(E)-(4S,7R,8S,9S,16S)-4,8-Bis-(tert-butyl-dimethyl-silanyloxy)-5,5,7,9,13-pentamethyl-16-[(E)-1-methyl-2-(2-methyl-thiazol-4-yl)-vinyl]-oxacyclohexadec-13-ene-2,6-dione