Structure of 281303. 3',4',5,7-Tetrahydroxyflavone; Digitoflavone; Flacitran; Luteoline; Luteolol; Salifazide; Weld lake; Yama Kariyasu; Cyanidenon; Cyanidenon 1470; 2-(3,4-Dihydroxyphenyl)-5,7-dihydroxy-4H-1-benzopyran-4-one; 2-(3,4-Dihydroxyphenyl)-5,7-dihydroxy-4H-benzopyran-4-one