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