Another name or variant for chinoline, a basic nitrogen-containing aromatic compound derived from coal tar, used in dyes and pharmaceuticals.
Variant spelling of 'chinoline,' from 'chino-' (relating to quinoline) + '-leine' (a variant chemical suffix). The alternate spelling reflects different European chemical nomenclature traditions.
Coal tar—the grimy leftover from gas production—was literally liquid gold to chemists because it contained hundreds of useful compounds like this, which is why it smells so distinctly terrible but created modern medicine!
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