Any heterocyclic compound with an aromatic ring with four carbon atoms and two nitrogen heteroatoms in 1 and 4 positions

The absorption spectra of some substituted pyrazines and their salts / by Frank Tutin and Frederic W. Caton.

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Pyrazines

Works from the collections

The absorption spectra of some substituted pyrazines and their salts / by Frank Tutin and Frederic W. Caton.