Heterocycles Pyrazines and Hydropyrazines

Pyrazine and hydropyrazines, H, °C, and 15N NMR of 88M162. Pyrazine derivatives, synthesis based on HCN derivatives 87AHC-(41)1. 

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Two Nitrogen Atoms (it is self-sub divided into 1,2-Heterocycles, 1,3-Heterocycles Monocyclic Pyrimidines and Hydropyrimidines Except Pyrimidine Nucleoside Bases and Nucleosides, Annulated Pyrimidines Except Purines, Pteridines, and Flavins, Pyrimidine Nucleoside Bases and Purines, Nucleotides and Nucleosides, Nucleic Acids, Pyrazines, and Hydropyrazines). 

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