Fagopyrin is a phototoxic substance found in the flowers of buckwheat (Fagopyrum esculentum). Their chemical structure contains a naphthodianthrone skeleton similar to that of hypericin. After exposure, fagopyrin can cause sensitivity to light, also called fagopyrism, an itchy skin rash.
Fagopyrin is a phototoxic substance found in the flowers of buckwheat (Fagopyrum esculentum). Their chemical structure contains a naphthodianthrone skeleton similar to that of hypericin. After exposure, fagopyrin can cause sensitivity to light, also called fagopyrism, an itchy skin rash.
== History and occurrence == The substance was isolated from flowers of the red-flowering genotype of buckwheat in 1941, and its chemical structure, which is derived from hypericin, was first described in 1979. Within the edible parts of the plant, it is found exclusively in the brown fruit husk of buckwheat grains.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).