10091-92-6 2(3H)-BENZOFURANONE, 3-(3-HYDROXY-5-OXO-4-PHENYL-2(5H)-FURYLIDENE)- 2(3H)-Benzofuranone, 3-(3-hydroxy-5-oxo-4-phenyl-2(5H)-furanylidene)- (9CI) 3-(3-Hydroxy-5-oxo-4-phenyl-2(5H)-furylidene)-2(3H)-benzofuranone 5-19-06-00444 (Beilstein Handbook Reference) BRN 1352451 Calycin Calycine Oxypulvic acid lactone