(1,1'-Biphenyl)-4-butanoic acid, 2',4'-dichloro-alpha-methyl-gamma-oxo- 104941-36-8 2',4'-Dichloro-alpha-methyl-gamma-oxo-(1,1'-biphenyl)-4-butanoic acid 4-(2',4'-Dichlorobiphenylyl)-2-methyl-4-oxobutanoic acid