montacephalin

Known as: 2-Butenoic acid, 3-methyl-, 2,3,3a,4,5,7,9a,9b-octahydro-4,9a-dihydroxy-6,9-dimethyl-3-methylene-2,7-dioxoazuleno(4,5-b)furan-5-yl ester, (3aR-(3aalpha,4alpha,5beta,9aalpha,9bbeta))-

National Institutes of Health