2H-Pyran-2,6(3H)-dione, 5-acetyl-4-hydroxy-3-(1-((4-hydroxyphenyl)amino)ethylidene)- 5-Acetyl-4-hydroxy-3-(1-(4-hydroxyphenyl)aminoethylidene)-2H-pyran-2,6(3H)-dione 59256-99-4 SK&F 64398 SK&F-64398 Skf 64398