hydroquinine

noun
hy·dro·qui·nine | \ˌhī-drō-ˈkwī-ˌnīn also -ˈkwin-ˌīn, esp British -kwin-ˈēn, -ˈkwin-ˌēn\

Medical Definition of hydroquinine 

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

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