Using CCOC(=O)CBr, O=c1c2c(oc3cc(O)ccc13)C(=Cc1ccccc1)CC2 to produce CCOC(=O)COc1ccc2c(=O)c3c(oc2c1)C(=Cc1ccccc1)CC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.