Using COC(=O)CBr, CCCc1cc2c(O)cccc2n1Cc1ccccc1-c1ccccc1 to produce CCCc1cc2c(OCC(=O)OC)cccc2n1Cc1ccccc1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.