2-(3-ethylpyridin-4-yl)-4,4-dimethyl-5H-1,3-oxazole

Ethyl 3-(4-pyridinyl)-2-propynoate

3-(4-吡啶)-2-丙炔酸

N-丙-2-炔基吡啶-4-甲酰胺

2-氯-N-苯基-4-吡啶羧酰胺