(3S,3aS,5aS,9bR)-3,5a,9-trimethyl-3a,4,5,9b-tetrahydro-3H-naphtho[7,8-d]furan-2,8-dione;(3S,3aS,5aS,9bR)-3,5a,9-trimethyl-3a,4,5,9b-tetrahydro-3H-benzo[g]benzofuran-2,8-dione;(3S,3aS,5aS,9bR)-3,5a,9-trimethyl-3a,4,5,9b-tetrahydro-3H-benzo[g]benzofuran-2,8-quinone
(3S,3aS,5aS,9bR)-3,5a,9-trimethyl-3a,4,5,9b-tetrahydro-3H-naphtho[7,8-d]furan-2,8-dione