cathinone

noun

cath·​i·​none ˈka-thə-ˌnōn 

: 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

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

see bath salts sense 2