(3S,3aR,4S,6S,6aR,7E,10S,12R,13E,15R,15aR)-3-benzyl-4,10,12-trimethyl-5-methylene-1-oxo-6,12-bis((2-(trimethylsilyl)ethoxy)methoxy)-2,3,3a,4,5,6,6a,9,10,11,12,15-dodecahydro-1H-cycloundeca[d]isoindol-15-yl acetate

(4R,6R,2E)-methyl 7-(dimethyl-t-butylsiloxy)-4-hydroxy-4,6-dimethylhept-2-enoate

(4R,6R,2E)-methyl 7-(dimethyl-t-butylsiloxy)-4,6-dimethyl-4-(2-trimethylsilylethoxymethoxy)hept-2-enoate

(4S,6R)-methyl 7-hydroxy-4,6-dimethyl-4-(2-trimethylsilylethoxymethoxy)heptanoate

(4S,6R)-methyl 4,6-dimethyl-4-(2-trimethylsilylethoxymethoxy)oct-7-enoate