Using C=CCBr, CCOC(=O)C(C#N)C1(C)CC(C)(C)CC(C)(C)C1 to produce C=CCC(C#N)(C(=O)OCC)C1(C)CC(C)(C)CC(C)(C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.