InChI=1S/C17H26O9/c1-2-3-4-6-9-10(24-9)7-5-8-11(18)25-17-14(21)12(19)13(20)15(26-17)16(22)23/h5,8-10,12-15,17,19-21H,2-4,6-7H2,1H3,(H,22,23)/b8-5+