Using O=C(O)c1ccnc2ccccc12, CCOC(=O)C1(N)Cc2ccccc2C1 to produce CCOC(=O)C1(NC(=O)c2ccnc3ccccc23)Cc2ccccc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.