InChI=1/C22H34O6/c1-13(2)14(23)8-9-15-20(3)10-7-11-21(4,18(24)26-5)16(20)12-17-22(15,28-17)19(25)27-6/h13,15-17H,7-12H2,1-6H dimethyl 2a,6-dimethyl-2-(4-methyl-3-oxopentyl)octahydronaphtho[2,3-b]oxirene-1a,6(2H)-dicarboxylate naphth[2,3-b]oxirene-1a,6(2H)-dicarboxylic acid, octahydro-2a,6-dimethyl-2-(4-methyl-3-oxopentyl)-, dimethyl ester