Using Cc1c(-c2ccccc2)oc2c(O)cccc2c1=O, BrCCCCBr to produce Cc1c(-c2ccccc2)oc2c(OCCCCBr)cccc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.