One of the mysteries of the English language finally explained.
A weakly basic, crystalline, heterocyclic compound first prepared by reaction of glyoxal and o-phenylenediamine and used in organic synthesis.
Late 19th century; earliest use found in Journal of the Chemical Society. From German Chinoxalin from Chin- (in Chinolin) + -oxal (in Glyoxal) + -in, so called on account of its structural similarity to quinoline and its preparation from glyoxal.
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