Aethusa cynapium is the scientific name for Fool's Parsley. The fresh leaves of Fool's Parsley contains polyenes aethusin, aethusanol A and asthusanol B. Fool's Parsley also contains varied flavone glycosides. This includes rutoside, narcissine, and camphor oil-3-glucorhamnoside. Fool's Parsley is often used for gastrointestinal complaints.