Using CCN=C=O, NCc1cccc2c1C(=O)N(C1CCC(=O)NC1=O)C2=O to produce CCNC(=O)NCc1cccc2c1C(=O)N(C1CCC(=O)NC1=O)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.