Using NC1(c2ccccc2)C(=O)NC(=O)NC1=O, COC(=O)CC(=O)O to produce COC(=O)CC(=O)NC1(c2ccccc2)C(=O)NC(=O)NC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.