Using CCO, CCOC(=O)C1=C(C(Br)Br)Nc2ccnc(OC(C)C)c2C1c1ccccc1 to produce CCOC(=O)C1=C(C=O)Nc2ccnc(OC(C)C)c2C1c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.