Using CCOC(=O)C(Cc1ccc(CNC(=O)OC(C)(C)C)cc1)OC(C)C to produce CCOC(=O)C(Cc1ccc(C[NH3+])cc1)OC(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.