Using CCCCI, CC(C)(C)OC(=O)[C@@H]1CNC(=O)N1C(=O)OCc1ccccc1 to produce CCCCN1C[C@@H](C(=O)OC(C)(C)C)N(C(=O)OCc2ccccc2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.