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