Using CCOC(=O)CBr, Oc1cc2c(c(OCc3ccccc3)c1)OCCC2 to produce CCOC(=O)COc1cc2c(c(OCc3ccccc3)c1)OCCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.