TANACETIN

(3aS,5aS,6R,9aR,9bS)-3a,4,5,5a,6,7,8,9,9a,9b-Decahydro-6,9a-dihydroxy-5a-methyl-3,9-bis(methylene)naphtho[1,2-b]furan-2(3H)-one