Using CC=O, CC(C)(C)OC(=O)NC1Cc2cccc(N)c2N(Cc2ccccc2)C1=O to produce CCNc1cccc2c1N(Cc1ccccc1)C(=O)C(NC(=O)OC(C)(C)C)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.