Using COC(=O)c1cc(-c2ccccc2)c(=O)n2ncc3ccccc3c12 to produce O=C(O)c1cc(-c2ccccc2)c(=O)n2ncc3ccccc3c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.