Using O=C(OCc1ccccc1)c1cc(O)cc(Br)c1, BrCCCCCCCCC1OCCO1 to produce O=C(OCc1ccccc1)c1cc(Br)cc(OCCCCCCCCC2OCCO2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.