Using O=C(O)Cc1cccc2[nH]c(=O)n(Cc3ccccc3)c12, NCc1ccccc1 to produce O=C(Cc1cccc2[nH]c(=O)n(Cc3ccccc3)c12)NCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.