Showing structure for methyl (2z)-5-[(1r,4ar,6s,7r,8as)-2-formyl-5,5,8a-trimethyl-6,7-bis({[(2z)-2-methylbut-2-enoyl]oxy})-1,4,4a,6,7,8-hexahydronaphthalen-1-yl]-3-methyl-4-oxopent-2-enoate