selegiline

Etymology
Probably from.

Noun

 * 1)  The levorotatory form of the  deprenyl that is administered in the form of its hydrochloride C13H17N·HCl as an adjuvant to therapy using the combination of ʟ-dopa and carbidopa in the treatment of Parkinson's disease and is sometimes used alone to treat endogenous depression or to treat dementia associated with Alzheimer's disease.