(S)-2-Methyl-butyric acid (1S,3R,7R,8R,8aR)-8-{2-[(2R,4R)-4-(tert-butyl-dimethyl-silanyloxy)-6-oxo-tetrahydro-pyran-2-yl]-ethyl}-3,7-dimethyl-6-oxo-1,2,3,5,6,7,8,8a-octahydro-naphthalen-1-yl ester

(1S,4S,7R,8R,8aR)-8-(2-((2R,4R)-4-((tert-butyldimethylsilyl)oxy)-6-oxotetrahydro-2H-pyran-2-yl)ethyl)-4-chloro-7-methyl-6-oxo-1,2,3,4,6,7,8,8a-octahydronaphthalen-1-yl (S)-2-methylbutanoate

(S)-2-Methyl-butyric acid (1S,3R,7R,8R,8aR)-8-{2-[(2R,4R)-4-(tert-butyl-dimethyl-silanyloxy)-6-oxo-tetrahydro-pyran-2-yl]-ethyl}-3,7-dimethyl-6-trifluoromethanesulfonyloxy-1,2,3,7,8,8a-hexahydro-naphthalen-1-yl ester