Using CC=CBr, O=C(O)c1ccccc1-c1c2ccc(=O)cc-2oc2cc(O)ccc12 to produce C=CCOC(=O)c1ccccc1-c1c2ccc(=O)cc-2oc2cc(O)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.