cath·i·none 
(kăthĭ-nōn′)
(kăthĭ-nōn′)n.
1. An alkaloid, C9H11NO, that is present in fresh khat leaves and is a central nervous system stimulant. It is a controlled substance in the United States.
2. Any of several synthetic derivatives of this alkaloid that are used as drugs for their stimulating properties.
[New Latin Catha, khat genus (from Arabic qāt, khat; see KHAT) + -IN(E)2 + -ONE.]