Wiktionary
histrelin
n. A nonapeptide analogue of gonadotropin-releasing hormone with added potency.
Wikipedia
Histrelin
Histrelin acetate is a nonapeptide analog of gonadotropin-releasing hormone (GnRH) with added potency. When present in the bloodstream, it acts on particular cells of the pituitary gland called gonadotropes. Histrelin stimulates these cells to release luteinizing hormone and follicle-stimulating hormone. Thus it is considered a gonadotropin-releasing hormone agonist or GnRH agonist.
Histrelin is marketed by Endo Pharmaceuticals under the brand names Vantas and Supprelin LA.