SEARCH Articles Figures Tables 1.4- Dihydropyridines 1.4- Dihydropyridines, formation from ethyl 5.6- Dihydropyridin-2-ones, formation Dihydropyridine Dihydropyridine derivatives, formation Dihydropyridine formation Hantzsch Dihydropyridine formation Hantzsch reaction Dihydropyridines, formation Dihydropyridines, formation