InChI=1S/C16H22O8/c1-2-3-4-5-6-7-8-9-10(17)23-16-13(20)11(18)12(19)14(24-16)15(21)22/h3-4,6-9,11-14,16,18-20H,2,5H2,1H3,(H,21,22)/b4-3-,7-6-,9-8+