Using O=Cc1cncc(-c2nc(NCc3ccccc3)c3c(-c4ccccc4)ccn3n2)c1 to produce OCc1cncc(-c2nc(NCc3ccccc3)c3c(-c4ccccc4)ccn3n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.