4-methyl-N-pyridin-2-ylbenzenesulfonamide

2-(2-pyridylamino)-3-aminopyridine

3-(1-oxide-2-pyridyl)-3H-1,2,3-triazolo(5,4-b)pyridine

2-(3-amino-2-pyridylamino)pyridine 1-oxide

Tl(2,2'-dipyridylamido)