Using C1=COCCC1, CC(=O)c1cc(O)cc(-c2cccc(Br)c2)c1O to produce O=C(Cc1cccc(Br)c1)c1cc(OC2CCCCO2)ccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.