[O-]c1ccccc1-c1c[nH]c[nH+]1 mol30550 0_1 Oc1ccccc1-c1c[nH]cn1 mol30550 0_2 Oc1ccccc1-c1c[n-]cn1 mol30550 -1_1 [O-]c1ccccc1-c1c[nH]cn1 mol30550 -1_2