Synonyms: butin (7, 3′, 4′-trihydroxydihydroflavone);4H-1-Benzopyran-4-one, 2-(3,4-dihydroxyphenyl)-2,3-dihydro-7-hydroxy-, (S)-;Butin;4H-1-Benzopyran-4-one,2-(3,4-dihydroxyphenyl)- 2,3-dihydro-7-hydroxy-,(2S)-;(2S)-2-(3,4-dihydroxyphenyl)-7-hydroxy-chroman-4-one;