Showing structure for (1s,2s,4ar,8ar)-1-(acetyloxy)-7-(2-hydroxypropan-2-yl)-1,4a-dimethyl-6-oxo-3,4,5,8a-tetrahydro-2h-naphthalen-2-yl (2s,3s)-2,3-dimethyloxirane-2-carboxylate