103425-50-9 Leucanthanolide Propanoic acid, 2-methyl-, 2,3,3a,4,5,8,9,11a-octahydro-3a,4-dihydroxy-6,10-dimethyl-3-methylene-2-oxocyclodeca(b)furan-5-yl ester, (3aS-(3aR*,4R*,5S*,6E,10E,11aS*))-