Showing structure for 3-[(3s,3ar,5ar,6s,7s,9ar,9br)-6,9a,9b-trimethyl-3-[(2r)-2-methyl-5-oxooxolan-2-yl]-7-(prop-1-en-2-yl)-decahydrocyclopenta[a]naphthalen-6-yl]propanoic acid