ethyl 4-(diisopropoxyphosphoryl)-4-(1-hydroxybutyl)pyridine-1(4H)-carboxylate

tert-butyl-(4-butyl-4H-pyridin-1-yl)-dimethylsilane

吡啶

4-butyl-1-ethoxycarbonyl-1,4-dihydropyridine

diisopropyl 1-ethoxycarbonyl-1,4-dihydropyridine-4-phosphonate