Cyclobutanecarboxylic acid, 3,3-difluoro-1-[4-(trifluoromethyl)phenyl]-

Benzoic acid, 4-(1-carboxy-3,3-difluorocyclobutyl)-, 1-methyl ester Cyclobutanecarboxylic acid, 1-(2-cyanophenyl)-3,3-difluoro- Cyclobutanecarboxylic acid, 1-(2-chlorophenyl)-3,3-difluoro- 1-(4-Methoxyphenyl)-3-oxocyclobutanecarboxylic Acid Cyclobutanecarboxylic acid, 1-(2-bromophenyl)-3,3-difluoro-

Methyl 1-(4-broMophenyl)-3-oxocyclobutanecarboxylate Cyclobutanecarboxylic acid, 3,3-difluoro-1-(3-methoxyphenyl)- Cyclobutanecarboxylic acid, 3,3-difluoro-1-[3-(trifluoromethyl)phenyl]- Cyclobutanecarboxylic acid, 3,3-difluoro-1-(4-methoxyphenyl)- Cyclobutanecarboxylic acid, 3,3-difluoro-1-(3-fluorophenyl)-

Cyclobutanecarboxylic acid, 3,3-difluoro-1-(2-fluorophenyl)- Cyclobutanecarboxylic acid, 3,3-difluoro-1-(4-fluorophenyl)- 3,3-difluoro-1-phenylcyclobutane-1-carboxylic Acid