Using COC(=O)Cn1c(=O)c2ccccc2n(CC(=O)Nc2cc(Cl)c(OC)cc2OC)c1=O to produce COc1cc(OC)c(NC(=O)Cn2c(=O)n(CC(=O)O)c(=O)c3ccccc32)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.