SEARCH Articles Figures Tables Annulated Five-Membered Heterocycles with One Heteroatom Five Heteroatoms Five-Membered Aromatic Heterocycles with One Heteroatom Five-Membered Heterocycled Five-membered heterocycles Five-membered heterocycles with more than one heteroatom Five-membered heterocycles with one Five-membered heterocyclics Heteroatom heterocycles Heteroatoms Heterocycles Heterocycles with One Heteroatom Heterocycles with heteroatoms Of heterocycles: five-membered rings with one heteroatom