Based on the SMILES representation O=C1OC(=O)c2cc(-c3ccc4c(c3)C(=O)OC4=O)ccc21, the molecule has no NR-Estrogen receptor alpha toxicity characteristics.
Based on the {SMILES__description} {#representation |!}{SMILES#}, the molecule has {toxicity_NR-ER#no &NULL}{toxicity_NR-ER__names__noun} {#properties|characteristics|features!}.