CSc1nc(C)nc2c1ncn2C    mol8291    0_1
CSc1nc(C)[nH+]c2c1ncn2C    mol8291    1_1
CSc1[nH+]c(C)nc2c1ncn2C    mol8291    1_2
CSc1nc(C)nc2c1[nH+]cn2C    mol8291    1_3