3,5,8a-Trimethyl-4a,5,8a,9-tetrahydro-4H-naphtho[2,3-b]furan-8-one 4aalphaH-3,5alpha,8abeta-Trimethyl-4,4a,8a,9-tetrahydro-naphtho[2,3-b]-furan-8-one InChI=1/C15H18O2/c1-9-4-5-14(16)15(3)7-13-11(6-12(9)15)10(2)8-17-13/h4-5,8-9,12H,6-7H2,1-3H3/t9-,12+,15-/m1/s naphtho[2,3-b]furan-8(4H)-one, 4a,5,8a,9-tetrahydro-3,5,8a-trimethyl-, (4aS,5R,8aR)- rel-(4aR,5S,8aS)-3,5,8a-trimethyl-4a,5,8a,9-tetrahydronaphtho[2,3-b]furan-8(4H)-one