InChI=1S/C15H16N4O6/c20-6-10(22)12(23)9(21)5-19-8-4-2-1-3-7(8)16-11-13(19)17-15(25)18-14(11)24/h1-4,9-10,12,20-23H,5-6H2,(H,18,24,25)/t9-,10-,12-/m1/s1