Using COCCl, O=C(CCCCCBr)N1C(=O)OC[C@H]1Cc1ccccc1 to produce COC[C@H](CCCCBr)C(=O)N1C(=O)OC[C@H]1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.