hydroquinine

noun

hy·​dro·​qui·​nine ˌhī-drō-ˈkwī-ˌnīn also -ˈkwin-ˌīn, especially British -kwin-ˈēn, -ˈkwin-ˌēn 

: a bitter crystalline antipyretic alkaloid C₂₀H₂₆N₂O₂ found with quinine in cinchona bark and usually present in commercial quinine