The SMILES O=C1C[N+]([O-])=C(c2ccccc2)c2cc(Cl)ccc2N1 represents a molecule that is not identified as toxic in the NR-ER assay.
The {SMILES__description} {SMILES#} {#represents|is from!} a molecule that is {toxicity_NR-ER#not &NULL}identified as {toxicity_NR-ER__names__adjective}.