Using CCC=CCC=CCC=CCCCCCCCCO, O=C(O)c1ccc(Br)o1 to produce CCC=CCC=CCC=CCCCCCCCCOc1ccc(C(=O)O)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.