Showing structure for (2s,3s,4r,4as,5r,8r,8ar)-5-formyl-4,8-dihydroxy-3-(3-methoxy-3-oxoprop-1-en-2-yl)-8a-methyl-octahydro-1h-naphthalen-2-yl 2-(hydroxymethyl)prop-2-enoate