InChI=1S/C17H22O9/c1-17(8-18,7-9-3-5-10(24-2)6-4-9)26-16-13(21)11(19)12(20)14(25-16)15(22)23/h3-6,8,11-14,16,19-21H,7H2,1-2H3,(H,22,23)