Using COC(=O)Cc1csc(N)n1, O=C(O)C(c1ccccc1)c1ccccc1 to produce COC(=O)Cc1csc(NC(=O)C(c2ccccc2)c2ccccc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.