Cn1c(=O)[nH]c2nc[nH]c2c1=O mol9680 0_1 Cn1c(=O)[nH]c2[nH+]c[nH]c2c1=O mol9680 1_1 Cn1c(=O)[n-]c2nc[nH]c2c1=O mol9680 -1_1 Cn1c(=O)[nH]c2nc[n-]c2c1=O mol9680 -1_2 Cn1c(=O)[n-]c2nc[n-]c2c1=O mol9680 -2_1