InChI=1S/C12H13N5O4/c13-4-12(10(20)9(19)7(3-18)21-12)8-2-1-6-11(14)15-5-16-17(6)8/h1-2,5,7,9-10,18-20H,3H2,(H2,14,15,16)/t7-,9-,10-,12+/m1/s1