InChI=1S/C11H15N5O4/c1-12-11-7-5(13-3-14-11)6(15-16-7)10-9(19)8(18)4(2-17)20-10/h3-4,8-10,17-19H,2H2,1H3,(H,15,16)(H,12,13,14)/t4-,8-,9-,10+/m1/s1