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Lactucopicrin (Intybin) is a bitter substance that has a sedative and analgesic effect, [1] acting on the central nervous system. It is a sesquiterpene lactone , and is a component of lactucarium , derived from the plant Lactuca virosa (wild lettuce), as well as being found in some related plants such as Cichorium intybus . [ 2 ]
The chemical constituents of lactucarium that have been investigated for biological activity include lactucin and its derivatives lactucopicrin and 11β,13-dihydrolactucin. Lactucin and lactucopicrin were found to have analgesic effects comparable to those of ibuprofen, and sedative activity in measurements of spontaneous movements of the mice. [9]
Lactucin is a bitter substance that forms a white crystalline solid and belongs to the group of sesquiterpene lactones. It is found in some varieties of lettuce and is an ingredient of lactucarium. It has been shown to have analgesic and sedative properties [1] which are speculated to occur via modulation of the GABAA receptor. [2]
They discovered two chemicals responsible for the properties of L. virosa; lactucopicrin and lactucin. In the United States, the plant experienced a resurgence in popularity in the 1970s. Today the plant is un-scheduled by the Food and Drug Administration (FDA), meaning it is legal to grow, purchase, and own without prescription or license.
Artemisinin, a new, highly-effective anti-malarial compound, is a sesquiterpene lactone found in Artemisia annua. Lactucin, desoxylactucin, lactucopicrin, lactucin-15-oxalate, lactucopicrin-15-oxalate are some of the most prominent found in lettuce and spinach, giving most of the bitter taste to these crops.
Substances which contribute to the plant's bitterness are primarily the two sesquiterpene lactones, lactucin and lactucopicrin. Other components are aesculetin, aesculin, cichoriin, umbelliferone, scopoletin, 6,7-dihydrocoumarin, and further sesquiterpene lactones and their glycosides. [7]
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