(1,1'-Biphenyl)-4-butanoic acid, 2',4'-difluoro-alpha-methyl-gamma-oxo-, (+-)-, compd. with benzenemethanamine (1:1) 161692-96-2 Benzenemethanamine, (+-)-2',4'-difluoro-alpha-methyl-gamma-oxo(1,1'-biphenyl)-4-butanoate