Using CC(C)(C)OC(=O)NCC(=O)N1CCC[C@H]1C(=O)O, COC(=O)CNC(=O)[C@@H](N)CCC(=O)OC(C)(C)C to produce COC(=O)CNC(=O)[C@H](CCC(=O)OC(C)(C)C)NC(=O)[C@@H]1CCCN1C(=O)CNC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.