SEARCH Articles Figures Tables Five-Membered Heterocycled Five-Membered Selenium-Nitrogen Heterocycles Five-membered heterocycles Five-membered heterocyclics Five-membered nitrogen Formation of Five-membered Nitrogen Heterocycles Heterocyclic nitrogen Nitrogen-containing heterocycle synthesis five-membered ring heterocycles Saturated five-membered nitrogen heterocycles Saturated five-membered nitrogen heterocycles reactions Saturated five-membered nitrogen heterocycles synthesis Synthesis of five-membered nitrogen heterocycle