InChI=1S/C16H16N2O8/c17-2-1-6-5-18-8-3-7(19)4-9(10(6)8)25-16-13(22)11(20)12(21)14(26-16)15(23)24/h3-5,11-14,16,18-22H,1H2,(H,23,24)