InChI=1/C20H28O4/c1-12-7-5-9-13(2)17(21)18-15(14(3)19(22)23-18)11-16-20(4,24-16)10-6-8-12/h8,13,15-16,18H,3,5-7,9-11H2,1-2,4H3/b12-8+/t13-,15-,16+,18+,20+/m0/s oxireno[4,5]cyclotetradeca[1,2-b]furan-10,12(1aH,10aH)-dione, 2,3,6,7,8,9,13,13a,14,14a-decahydro-1a,5,9-trimethyl-13-methylene-, (1aR,4E,9S,10aR,13aS,14aR)- rel-(1aR,4E,9S,10aR,13aS,14aR)-1a,5,9-trimethyl-13-methylene-2,3,6,7,8,9,13,13a,14,14a-decahydrooxireno[4,5]cyclotetradeca[1,2-b]furan-10,12(1aH,10aH)-dione