The story
From mel(amine) + ars(enic) + -o- + pro(pylene) + -ol.
Etymology from Wiktionary, CC BY-SA 4.0.
melarsoprol
Today it means: An organic arsenic compound, C₁₂H₁₅AsN₆OS₂, administered intravenously to treat late-stage African trypanosomiasis (sleeping sickness). Full definition →