2-丁基-4-甲基-吡啶

4-methyl-2-(4-pyridyl)methylpyridine

1-hydroseleno-1,2-di(4-pyridyl)-ethane

1-[2-(4-methyl)pyridyl]-1,2-di(4-pyridyl)-ethane

4-[2-(4-methylpyridyl)]-2-(4-pyridyl)methylpyridine