Sentence Examples with the word Pyrazine

And III., pyrazine being I.: HC N CH HC NH CH HC N CH2 H2C NH CH2 HC N CH2 H2C NH H2 I (Pyrazine) II (1.4 dihydro) III (2.3 dihydro) IV (Piperazine).

Their alkyl derivatives readily oxidize to pyrazine carboxylic acids.