Structures of the fenamates tested. Flufenamic acid (N-[3-(trifluoromethyl)-phenyl]anthranilic acid), niflumic acid (2-{[3-(trifluoromethyl)phenyl]amino}nicotinic acid), S645648 (N-(1,3-dimethyl-5-pyrazolyl) anthranilic acid), DCDPC (3′-5-dichlorodiphenylamine-2-carboxylic acid), meclofenamic acid (N-(2,6-dichloro-3-methylphenyl)anthranilic acid), tolfenamic acid (N-(2-methyl-3-chlorophenyl)anthranilic acid) and mefenamic acid (2-(2,3-dimethylphenyl)aminobenzoic acid).