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