InChI=1S/C16H20O9/c1-2-10(17)23-7-8-3-5-9(6-4-8)24-16-13(20)11(18)12(19)14(25-16)15(21)22/h3-6,11-14,16,18-20H,2,7H2,1H3,(H,21,22)