InChI=1S/C16H20O9/c1-8(17)23-7-6-9-2-4-10(5-3-9)24-16-13(20)11(18)12(19)14(25-16)15(21)22/h2-5,11-14,16,18-20H,6-7H2,1H3,(H,21,22)