(1,1'-Biphenyl)-4-butanoic acid, 2',4'-difluoro-alpha-methyl-gamma-oxo-, L-lysine salt (1:1) (S)-(+)-Lysine salt of 4-(2',4'-difluorobiphenyl-4-yl)-2-methyl-4-oxobutanoic acid 161692-95-1 L-Lysine, mono((+-)-2',4'-difluoro-alpha-methyl-gamma-oxo(1,1-biphenyl)-4-butanoate)