Five-Membered Ring Heterocycles with Two Hetero Atoms

Five-Membered Ring Heterocycles with Two Hetero Atoms 

Hetero atoms in the five-membered heterocycles can exist at 1,2 or 1,3 positions of the ring. The first of which is only represented by pyrazoles, whereas all possible variations may exist for the 1,3-hetero atoms. 

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Five-Membered Ring Heterocycles with Two Hetero Atoms Imidazoles, Benzimidazoles, 1H-pyrazoles, Oxazoles, Isoxazoles, Thiazoles, and Indazoles... 

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