Using CCOC(=O)CBr, O=c1c(-c2ccccc2)coc2cc(O)ccc12 to produce COC(=O)COc1ccc2c(=O)c(-c3ccccc3)coc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.