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

6(R)-<2-<1,2,3,4,4a,5,6,7,8,8a(R)-Decahydro-2(R),6(S)-dimethyl-8(S)-<<2(S)-methylbutyryl>oxy>-3(S),4(R)-(thioxomethylenedioxy)-1(S)-naphthyl>ethyl>-3,4,5,6-tetrahydro-4(R)-<(tert-butyldimethylsilyl)oxy>-2H-pyran-2-one