InChI=1S/C20H26O5/c1-14(5-9-18(21)20(2,3)23-4)11-12-24-16-8-6-15-7-10-19(22)25-17(15)13-16/h6-8,10-11,13,18,21H,5,9,12H2,1-4H3/b14-11+