Narceine is an opium alkaloid produced by the Papaver somniferum (opium poppy) plant. It is a bitter, crystalline compound with narcotic effects. It was formerly used as a substitute for morphine. Its name is derived from the Greek (nárkē), meaning numbness, and the postfix -ine referring to an alkaloid. See also Noscapine, a related alkaloid References Natural opium alkaloids Salicylyl ethers Piceol ethers Benzodioxoles Phenethylamines Pyrogallol ethers