2(5H)-FURANONE, 5-((4-FLUOROPHENYL)METHYLENE)-4-HYDROXY-3-PHENYL- 5-((4-Fluorophenyl)methylene)-4-hydroxy-3-phenyl-2(5H)-furanone 5-(4-Fluorobenzyliden)-3-phenyl-4-hydroxy-2(5H)-on [German] 95602-25-8