Saffron, also known as Crocus sativus, is a perennial flower of Crocus in Iris, and its medicinal part is the dry stigma of Crocus sativus, which is a traditional Chinese medicine. It is mainly distributed in southern Europe, Iran and other places, with a small amount of cultivation in China.
Crocin, one of the extracts of crocus sativus, also known as crocin and crocin, is a kind of water-soluble carotenoid, which is composed of crocetin and gentianodisaccharide, including crocin I and crocin II, both of which belong to diterpenoids.