cathinone

:  an alkaloid C₉H₁₁NO found in the leaves of khat that is a stimulant of the central nervous system with pharmacological properties similar to those of amphetamine Khat technically isn't illegal in the U.S.—but the cathinone it contains is.—Colin McDonald, The Seattle Post-Intelligencer, 21 June 2007; also :  any of various derivatives of this alkaloid “Bath salts” is the street name for a combination of synthetic cathinones, manmade versions of a stimulant found in the khat plant that has been around for ages …—Tammie Smith, The Richmond (Virginia) Times-Dispatch, 8 July 2012—see bath salts 2