Using CCOC(=O)c1c(C)cc(OCc2ccccc2)cc1O, BrCCCc1ccccc1 to produce CCOC(=O)c1c(C)cc(OCc2ccccc2)cc1OCCCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.