COc1cccc2c1N=C(NCC(F)F)N[C@@H]2C    mol21291    0_1
COc1cccc2c1N=C(NCC(F)F)[N-][C@@H]2C    mol21291    -1_1
COc1cccc2c1N=C([N-]CC(F)F)N[C@@H]2C    mol21291    -1_2