Using C=C[C@H](CC(=O)OCC)NC(=O)[C@@H]1CCCN(C(=O)CCC2CCN(C(=O)OC(C)(C)C)CC2)C1 to produce CCOC(=O)C[C@H](CC)NC(=O)[C@@H]1CCCN(C(=O)CCC2CCN(C(=O)OC(C)(C)C)CC2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.