InChI=1S/C20H32O5/c1-2-3-5-8-16(21)13-11-15-12-14-18(23)20(15)17(22)9-6-4-7-10-19(24)25/h11,13,16-17,21-22H,2-10,12,14H2,1H3,(H,24,25)/b13-11+