methyl 4-pyridin-4-yl-1H-pyrazole-5-carboxylate

(Z)-2-phenyl-4-(pyridin-4-ylmethylene)oxazol-5(4H)-one

methyl Z-2-benzamido-3-(4-pyridyl)propenoate

cis-3-benzamido-3-carbomethoxy-4-(4-pyridyl)-Δ1-pyrazoline

3-(4-吡啶)-2-丙酸乙酯