InChI=1S/C17H26O9/c1-24-11(18)9-7-5-3-2-4-6-8-10-25-17-14(21)12(19)13(20)15(26-17)16(22)23/h3,5,7,9,12-15,17,19-21H,2,4,6,8,10H2,1H3,(H,22,23)/b5-3-,9-7+