6-(2-吡啶基)-1,3,5-三嗪-2,4-二胺

2,5-dipyridin-2-yl-1,3,4-thiadiazole

2-[bis(1H-pyrrol-2-yl)methyl]pyridine

2,4-dimethyl-6-pyridin-2-yl-1,2,4,5-tetrazinan-3-one