InChI=1S/C20H32O4/c1-13-7-9-17-19(3,10-5-11-20(17,4)18(23)24)15(13)8-6-14(2)16(22)12-21/h15-17,21-22H,1-2,5-12H2,3-4H3,(H,23,24)