Using COC(=O)C(O)[C@@H](N)CC(C)C, CC(C)C[C@H](NC(=O)C(CC(=O)N1CCOCC1)Cc1cccc2ccccc12)C(=O)O to produce COC(=O)C(O)[C@H](CC(C)C)NC(=O)[C@H](CC(C)C)NC(=O)C(CC(=O)N1CCOCC1)Cc1cccc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.