Using CCOC=O, CC(=O)Nc1ccc(C(=O)c2ccc3c(c2)CC(=O)N3)cc1 to produce CC(=O)Nc1ccc(C(=O)c2ccc3c(c2)C(=CO)C(=O)N3)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.