The SMILES O=C1OC(=O)c2cc(-c3ccc4c(c3)C(=O)OC4=O)ccc21 represents a molecule that is not identified as toxic in the NR-Estrogen receptor alpha assay.
The {SMILES__description} {SMILES#} {#represents|is from!} a molecule that is {toxicity_NR-ER#not &NULL}identified as {toxicity_NR-ER__names__adjective}.