Horsfiline

Horsfiline is an oxindole alkaloid found in the plant Horsfieldia superba, which is used in traditional herbal medicine. It has analgesic effects and has been the subject of research both to produce it synthetically by convenient routes     and to develop analogues and derivatives which may have improved analgesic effects.

It is a member of the spiroindolone class. Elacomine has a similar chemical structure.