Naphtho(1,2-b)furan-2,8(3H,4H)-dione, 3a,5,5a,9b-tetrahydro-3,5a,9-trimethyl-, (3S-(3alpha,3aalpha,5abeta,9bbeta))-
(3S,3AS,5AS)-3,5a,9-Trimethyl-3a,4,5,5a-Tetrahydronaphtho(1,2-B)Furan-2,8(3H,9bh)-Dione