5,15-di(3-pyridyl)-10,20-di(4-dodecyloxyphenyl)porphin

trans-1-(3-pyridyl)-2-(3-pyridyl)ethylene

3-(2,2-dibromoethenyl)pyridine

3-(2-diethoxyphosphorylethynyl)pyridine

1-(4-methoxyphenyl)-3-pyridin-3-ylprop-2-en-1-one