Using CCCBr, CCOc1ccc(-c2cccc3c2CCC3=O)c(O)c1OC to produce CCCOc1c(-c2cccc3c2CCC3=O)ccc(OCC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.