(E)-(4S,8S,15S,16S,17R)-4-(tert-Butyl-dimethyl-silanyloxy)-16-hydroxy-15,17-dimethyl-8-[(E)-1-methyl-2-(2-methyl-thiazol-4-yl)-vinyl]-7-oxa-spiro[2.15]octadec-10-ene-6,18-dione

(Z)-(4S,8S,15S,16R,17S)-4-(tert-Butyl-dimethyl-silanyloxy)-16-hydroxy-15,17-dimethyl-8-[(E)-1-methyl-2-(2-methyl-thiazol-4-yl)-vinyl]-7-oxa-spiro[2.15]octadec-10-ene-6,18-dione

(E)-(4S,8S,15S,16R,17S)-4-(tert-Butyl-dimethyl-silanyloxy)-16-hydroxy-15,17-dimethyl-8-[(E)-1-methyl-2-(2-methyl-thiazol-4-yl)-vinyl]-7-oxa-spiro[2.15]octadec-10-ene-6,18-dione

(S)-3-(tert-Butyl-dimethyl-silanyloxy)-3-[1-((2R,3S,4S)-3-hydroxy-2,4-dimethyl-non-8-enoyl)-cyclopropyl]-propionic acid (S)-1-[(E)-1-methyl-2-(2-methyl-thiazol-4-yl)-vinyl]-but-3-enyl ester

(S)-3-(tert-Butyl-dimethyl-silanyloxy)-3-[1-((2S,3R,4S)-3-hydroxy-2,4-dimethyl-non-8-enoyl)-cyclopropyl]-propionic acid (S)-1-[(E)-1-methyl-2-(2-methyl-thiazol-4-yl)-vinyl]-but-3-enyl ester