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