Using CC(C)=CB1OC(C)(C)C(C)(C)O1, CCOC(=O)C1(NC(=O)c2ccc(C)cc2Br)Cc2ccccc2C1 to produce CCOC(=O)C1(NC(=O)c2ccc(C)cc2C=C(C)C)Cc2ccccc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.