Using COC(=O)c1ccc2c(c1)c(=O)cc(-c1ccccc1)n2C to produce Cn1c(-c2ccccc2)cc(=O)c2cc(C(=O)O)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.