An enzyme that catalyzes the production of these compounds will sometimes also produce a trace racemic mixture of 15-HETE, which rearranges to form specialized pro-resolving mediators called lipoxins.
An enzyme that catalyzes the synthesis of one of these compounds is used as a diagnostic marker if nose and ear fluid leaks contain CSF. An enzyme that catalyzes the production of these compounds will sometimes also produce a trace racemic mixture of 15-HETE, which rearranges to form specialized pro-resolving mediators called lipoxins. Analogs of these compounds are commonly used in treating open-angle glaucoma. These compounds are administered to keep patent ductus arteriosus open until surgery can be performed. Sir John Vane partly won his Nobel for discovering the (*) I2 one of these compounds, whose more common name ends in "cyclin." In platelets, an enzyme converts the H2 one of these compounds into the highly-similar thromboxane A1. NSAIDs such as aspirin work by targeting COX-1, thereby inhibiting the formation of these compounds. For 10 points, name these lipids derived from arachidonic acid, which serve as powerful vasodilators and mediators of inflammation. 
An enzyme that catalyzes the synthesis of one of these compounds is used as a diagnostic marker if nose and ear fluid leaks contain CSF.
prostaglandins 