Using Br[Zn]CC1OCCO1, C[C@@H]1Cc2cc(Br)ccc2C(=O)O1 to produce C[C@@H]1Cc2cc(CC3OCCO3)ccc2C(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.