SEARCH Articles Figures Tables Five-Membered Selenium-Nitrogen Heterocycles Five-membered Nitrogen- and Oxygen-containing Rings Five-membered Nitrogen-containing Rings Five-membered Rings containing more than One Nitrogen Five-membered nitrogen heterocycles Five-membered rings with two or more nitrogen atoms Formation of Five-membered Nitrogen Heterocycles 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