Using CN(CCOc1ccc(Cn2cc(CO)c(-c3ccccc3)c2)cc1)c1ccccn1 to produce CN(CCOc1ccc(Cn2cc(C=O)c(-c3ccccc3)c2)cc1)c1ccccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.