(1R,3S,4S,8R,9R)-4-acetoxy-5,5-bis(methoxycarbonyl)-11,11-dimethyl-8-vinyl-2,10,12-trioxatricyclo<7.3.0.03,8>dodecane

(1R,3S,4R,8R,9R)-5,5-bis(methoxycarbonyl)-11,11-dimethyl-8-vinyl-2,10,12-trioxatricyclo<7.3.0.03,8>dodecan-4-ol

Formic acid (S)-2-benzyloxy-1-((3aS,4R,7aR)-4-formyl-2-oxo-octahydro-benzofuran-4-yl)-ethyl ester