Using CCOC(=O)CC1CCc2ccc(NC(=O)OC(C)(C)C)cc2C1, CI to produce CCOC(=O)CC1CCc2ccc(N(C)C(=O)OC(C)(C)C)cc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.