ravimina ja nar­kootikumina kasutatav koka-punapuu (Erythroxylum coca) lehtedes sisalduv kesknärvi­süsteemi erutav alkaloid, kokalehtedes sisalduv psühhoaktiivne alkaloid, mida meditsiinis kasut paikse tuimastina; on närvisüsteemi stimuleeriva toimega ja tekitab kiiresti sõltuvuse, stimulant extracted from the leaves of the coca plant, a bush that grows in various regions of South America, Indonesia and East Africa, a bitter crystalline alkaloid C17H21NO4 obtained from coca leaves that is used especially in the form of its hydrochloride medically as a topical anesthetic and illicitly for its euphoric effects and