Anthranylic acid derivatives are direct structural analogs of salicylic acid derivatives. They possess analgesic, anti-inflammatory, and fever-reducing activity. They are similar to pyrazolones in terms of analgesic and fever-reducing activity, yet they exceed the anti-inflammatory activity of salicylates. The mechanism of action of this series of nonsteroid, anti-inflammatory analgesics is not conclusively known.
Flufenamic acid: Flufenamic acid, N-(a,a,a-trifluoro-m-tolyl)anthranylic acid (3.2.18), is synthesized by the reaction of 2-chlorobenzoic acid with 3-trifluoromethylaniline in the presence of potassium carbonate and copper filings [78,79].
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