Showing structure for methyl 5-{[(1s,4ar,5r,6s,8as)-5-[3-(formyloxy)-3-methylbutyl]-6-hydroxy-5,8a-dimethyl-2-methylidene-hexahydro-1h-naphthalen-1-yl]methyl}-6-methoxy-2-methyl-4-oxopyran-3-carboxylate