Synonyms: 3(2H)-Benzofuranone, 2-[(3,4-dihydroxyphenyl)methylene]-6-hydroxy-, (2Z)-, 3(2H)-Benzofuranone, 2-(3,4-dihydroxybenzylidene)-6-hydroxy- (7CI,8CI); 3(2H)-Benzofuranone, 2-[(3,4-dihydroxyphenyl)methylene]-6-hydroxy-, (Z)-; Sulfuretin (6CI); (2Z)-2-[(3,4-Dihydroxyphenyl)methylene]-6-hydroxy-3(2H)-benzofuranone; 2-(3,4-Dihydroxybenzylidene)-6-hydroxy-3(2H)-benzofuranone; 3',4',6-Trihydroxyaurone; 3',4',6-Trihydroxybenzalcoumaranone; SulphuretinDouble bond geometry as shown.