Wiktionary
fenamic acid
n. (context chemistry English) The parent structure for several nonsteroidal anti-inflammatory drugs, including mefenamic acid, tolfenamic acid, flufenamic acid, and meclofenamic acid.
Wikipedia
Fenamic acid
Fenamic acid is a molecule which, especially in its ester form, fenamate, serves as a parent structure for several non-steroidal anti-inflammatory drugs, including mefenamic acid, tolfenamic acid, flufenamic acid, and meclofenamic acid. These drugs are commonly referred to as "anthranilic acid derivatives" or "fenamates" because fenamic acid is a derivative of anthranilic acid.