FC(F)(F)c1cnc(-c2cccnc2)[nH]1 mol16611 0_1 FC(F)(F)c1cnc(-c2ccc[nH+]c2)[nH]1 mol16611 1_1 FC(F)(F)c1c[nH+]c(-c2cccnc2)[nH]1 mol16611 1_2 FC(F)(F)c1cnc(-c2cccnc2)[n-]1 mol16611 -1_1