Matches in DBpedia 2014 for { ?s ?p The 2- and 4-quinolones are a class of bicyclic molecules, organic chemical structures that are related to the heteroaromatic coal tar isolate quinoline, see image at right. Specific quinoline molecules substituted with an hydroxyl functional group at carbons 2 and 4 (C-2 and C-4, see image) are most often observed in isomeric forms termed 2- and 4-quinolones, respectively (tautomers, relationships explained further below).. }
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- 2-_and_4-Quinolones comment "The 2- and 4-quinolones are a class of bicyclic molecules, organic chemical structures that are related to the heteroaromatic coal tar isolate quinoline, see image at right. Specific quinoline molecules substituted with an hydroxyl functional group at carbons 2 and 4 (C-2 and C-4, see image) are most often observed in isomeric forms termed 2- and 4-quinolones, respectively (tautomers, relationships explained further below).".