InChI=1S/C16H20O9/c17-10(18)7-9(6-8-4-2-1-3-5-8)24-16-13(21)11(19)12(20)14(25-16)15(22)23/h1-5,9,11-14,16,19-21H,6-7H2,(H,17,18)(H,22,23)