InChI=1S/C17H20O9/c1-17(2)14-12(24-14)8-6(4-3-5-7(8)26-17)23-16-11(20)9(18)10(19)13(25-16)15(21)22/h3-5,9-14,16,18-20H,1-2H3,(H,21,22)