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