InChI=1S/C20H32O4/c1-2-3-9-13-18-19(24-18)16-15-17(21)12-10-7-5-4-6-8-11-14-20(22)23/h4,6-7,10,15-19,21H,2-3,5,8-9,11-14H2,1H3,(H,22,23)