Synonyms: 4H-1-Benzopyran-4-one, 2-(3,4-dihydroxyphenyl)-2,3-dihydro-7-hydroxy-, (2S)-, 4H-1-Benzopyran-4-one, 2-(3,4-dihydroxyphenyl)-2,3-dihydro-7-hydroxy-, (S)-; Butin (6CI); Flavanone, 3',4',7-trihydroxy- (8CI); (2S)-2-(3,4-Dihydroxyphenyl)-2,3-dihydro-7-hydroxy-4H-1-benzopyran-4-one; (-)-Butin; (S)-7,3',4'-Trihydroxyflavanone; 7,3',4'-TrihydroxyflavanoneRotation (-)., Absolute stereochemistry.