1-Butanone, 1-(4-methoxyphenyl)- 4'-Methoxybutyrophenone 4-Methoxybutyrophenone 4160-51-4 AI3-23190 Butyrophenone, 4'-methoxy- (8CI) EINECS 223-995-5 NSC 5615 p-Methoxybutyrophenone