(2Z,4E,12E,14E)-(6R,7R,8S,9S,10R,16S,17R,18S)-7,9-Bis-(diethyl-isopropyl-silanyloxy)-8-ethyl-17-hydroxy-2,16-dimethoxy-19-[(4-methoxy-phenyl)-diphenyl-methoxy]-4,6,10,12,18-pentamethyl-nonadeca-2,4,12,14-tetraenoic acid methyl ester
(2Z,4E,12E,14E)-(6R,7R,8S,9S,10R,16S,17R,18S)-7,9-Bis-(diethyl-isopropyl-silanyloxy)-8-ethyl-17-hydroxy-2,16-dimethoxy-19-[(4-methoxy-phenyl)-diphenyl-methoxy]-4,6,10,12,18-pentamethyl-nonadeca-2,4,12,14-tetraenoic acid
(3Z,5E,13E,15E)-(7R,8R,9S,10S,11R,17S,18R)-8,10-Bis-(diethyl-isopropyl-silanyloxy)-9-ethyl-3,17-dimethoxy-18-{(S)-2-[(4-methoxy-phenyl)-diphenyl-methoxy]-1-methyl-ethyl}-5,7,11,13-tetramethyl-oxacyclooctadeca-3,5,13,15-tetraen-2-one