Showing structure for methyl 4-[2-(4,6-dimethyl-7-oxohepta-1,5-dien-1-yl)-3-hydroxy-5-(1h-indol-3-ylmethyl)-6,6a-dimethyl-1ah,2h,5h,5ah,6h-oxireno[2,3-f]isoindol-2a-yl]-4-oxobutanoate