4H-3b,8-(epoxyethano)cyclopent[a]indene-4,10-dione, 1,3a,5,6,7,7a,8,8a-octahydro-3a,7a,8a-trihydroxy-3,5,8-trimethyl-2-(1-methylethyl)-, (3aR,3bR,7aS,8R,8aR)- Anhydrocinnzeylanone InChI=1/C20H28O6/c1-10(2)13-8-18(24)16(5)9-14(21)26-20(19(18,25)12(13)4)15(22)11(3)6-7-17(16,20)23/h10-11,23-25H,6-9H2,1-5H3/t11?,16-,17-,18+,19+,20+/m0/s rel-(3aR,3bR,7aS,8R,8aR)-3a,7a,8a-trihydroxy-2-isopropyl-3,5,8-trimethyl-1,3a,5,6,7,7a,8,8a-octahydro-4H-3b,8-(epoxyethano)cyclopenta[a]indene-4,10-dione