Using COc1cccc(-c2nn(Cc3ccccc3)c3ncnc(Nc4cccc(Cl)c4)c23)c1 to produce Oc1cccc(-c2n[nH]c3ncnc(Nc4cccc(Cl)c4)c23)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.