Using CCc1nn(Cc2cccc(C(O)CO)n2)c2cccc(NC(=O)c3cnc4ccccn34)c12 to produce CCc1nn(Cc2cccc(C=O)n2)c2cccc(NC(=O)c3cnc4ccccn34)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.