InChI=1S/C16H20O9/c17-10(18)3-1-2-8-4-6-9(7-5-8)24-16-13(21)11(19)12(20)14(25-16)15(22)23/h4-7,11-14,16,19-21H,1-3H2,(H,17,18)(H,22,23)