dopa
Pronunciation: /ˈdəʊpə/
noun
- a compound which is present in nervous tissue as a precursor of dopamine, used in the treatment of Parkinson’s disease. See also l-dopa
- An amino acid; alternative name: dihydroxyphenylalanine; chemical formula: C9H11NO4

Origin:
early 20th century: from German, acronym from the systematic name