Using BrCc1nc(-c2ccccc2)nc2ccccc12, CCOC(=O)C(C)C(=O)OCC to produce CC(Cc1nc(-c2ccccc2)nc2ccccc12)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.