CNc1nc(N)cnc1C(N)=O    mol6771    0_1
C[NH2+]c1nc(N)cnc1C(N)=O    mol6771    1_1
CNc1[nH+]c(N)cnc1C(N)=O    mol6771    1_2
CNc1nc(N)c[nH+]c1C(N)=O    mol6771    1_3
CNc1nc([NH3+])cnc1C(N)=O    mol6771    1_4