Using CCOC(=O)Cc1cc2c(C(=O)OCC)c(C)[nH]c2cc1Br to produce CCOC(=O)c1c(C)[nH]c2cc(Br)c(CC(=O)O)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.