Using Cn1c(-c2ccccn2)cc2onc(-c3ccccc3)c2c1=O to produce Cn1c(-c2ccccn2)cc(O)c(C(=N)c2ccccc2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.