(3aR,5S,9S,12R,13S,14S,17aR)-9-(tert-Butyl-dimethyl-silanyloxy)-13-hydroxy-2,2,10,10,12,14,17a-heptamethyl-5-[(E)-1-methyl-2-(2-methyl-thiazol-4-yl)-vinyl]-dodecahydro-1,3,6-trioxa-cyclopentacyclohexadecene-7,11-dione

(3S,6R,7S,8S)-3-(tert-Butyl-dimethyl-silanyloxy)-7-hydroxy-11-{(4R,5R)-5-[(E)-(S)-2-hydroxy-3-methyl-4-(2-methyl-thiazol-4-yl)-but-3-enyl]-2,2,4-trimethyl-[1,3]dioxolan-4-yl}-4,4,6,8-tetramethyl-5-oxo-undecanoic acid