InChI=1S/C17H26O9/c1-10(18)8-6-4-2-3-5-7-9-11(19)25-17-14(22)12(20)13(21)15(26-17)16(23)24/h2-3,7,9-10,12-15,17-18,20-22H,4-6,8H2,1H3,(H,23,24)/b3-2-,9-7+