InChI=1S/C13H16N2O7/c1-6(16)10(13(21)22)14-3-2-7-4-8(11(17)18)15-9(5-7)12(19)20/h2-4,6,9-10,15-16H,5H2,1H3,(H,17,18)(H,19,20)(H,21,22)/b7-2-,14-3-/t6?,9-,10?/m0/s1