InChI=1S/C11H15N5O4/c12-7(4-17)10-15-8(1-6-2-13-5-14-6)11(20)16(10)3-9(18)19/h2,5,7,10,17H,1,3-4,12H2,(H,13,14)(H,18,19)/t7-,10-/m0/s1