2(3H)-Furanone, 4,5-dihydro-4-acetyl-5-(3,4-dimethoxyphenyl)-, (E)- 4-(3',4'-Dimethoxyphenyl)-3-acetyl-4-butanolide 72471-47-7 BRN 4486159 trans-4-Acetyl-5-(3,4-dimethoxyphenyl)-4,5-dihydro-2(3H)-furanone