InChI=1S/C17H22O9/c1-8(7-18)5-6-9-10(19)3-2-4-11(9)25-17-14(22)12(20)13(21)15(26-17)16(23)24/h2-5,12-15,17-22H,6-7H2,1H3,(H,23,24)/b8-5+