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