9-Hydroperoxy-5,9,13-trimethyl-18-methylene-4,16-dioxa-tricyclo[13.3.0.0^(3,5)]octadec-7-ene-14,17-dione InChI=1/C20H28O6/c1-12-7-5-8-19(3,26-23)9-6-10-20(4)15(25-20)11-14-13(2)18(22)24-17(14)16(12)21/h6,9,12,14-15,17,23H,2,5,7-8,10-11H2,1,3-4H3/b9-6+/t12-,14+,15-,17-,19+,20-/m1/s Uprolide H oxireno[4,5]cyclotetradeca[1,2-b]furan-10,12(1aH,10aH)-dione, 2,5,6,7,8,9,13,13a,14,14a-decahydro-5-hydroperoxy-1a,5,9-trimethyl-13-methylene-, (1aR,5S,9R,10aR,13aS,14aR)- rel-(1aR,5S,9R,10aR,13aS,14aR)-5-hydroperoxy-1a,5,9-trimethyl-13-methylene-2,5,6,7,8,9,13,13a,14,14a-decahydrooxireno[4,5]cyclotetradeca[1,2-b]furan-10,12(1aH,10aH)-dione