InChI=1/C18H18N3O4/c19-7-12-13(20)6-16-11(18(12)21)3-9-4-14(22)10(5-15(9)25-16)17-8-23-1-2-24-17/h4-6,11,16-17,20,22H,1-3,8,21H2/q-1/p+1/t11-,16+,17+/m0/s1/fC18H19N3O4/h20H/q DFA558184781091C