InChI=1S/C20H32O5/c21-15-7-3-4-8-17(22)13-11-16-12-14-19(23)18(16)9-5-1-2-6-10-20(24)25/h11,13,17,21-22H,1-10,12,14-15H2,(H,24,25)/b13-11+