Using CCOCCCC[C@@H](c1ccccc1)[C@@H]1CCCN(C(=O)N[C@@H](CC2CCCCC2)CN(C)C(=O)OC(C)(C)C)C1 to produce CCOCCCC[C@@H](c1ccccc1)[C@@H]1CCCN(C(=O)N[C@H](CNC)CC2CCCCC2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.