InChI=1S/C16H22O9/c17-10(18)8-6-4-2-1-3-5-7-9-24-16-13(21)11(19)12(20)14(25-16)15(22)23/h2-6,8,11-14,16,19-21H,1,7,9H2,(H,17,18)(H,22,23)/b4-2-,5-3-,8-6+