InChI=1S/C11H15N5O4/c12-11-15-5-3(1-13-7(5)10(20)16-11)6-9(19)8(18)4(2-17)14-6/h1,4,6,8-9,13-14,17-19H,2H2,(H3,12,15,16,20)/t4-,6+,8-,9+/m1/s1