InChI=1S/C20H32O5/c1-2-3-6-9-16(21)11-14-19-15-12-17(22)20(19,25-19)13-8-5-4-7-10-18(23)24/h11,14,16,21H,2-10,12-13,15H2,1H3,(H,23,24)/b14-11+