Using CN(C)C(=O)CC1(O)C(=O)N(Cc2ccccc2)c2ccccc21 to produce CN(C)C(=O)CC1C(=O)N(Cc2ccccc2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.