Using CCOC(CN(Cc1ccccc1)C(=O)[C@H](C)N)OCC, O=C(O)CONC(=O)NCc1ccccc1 to produce CCOC(CN(Cc1ccccc1)C(=O)[C@H](C)NC(=O)CONC(=O)NCc1ccccc1)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.