Although cinchona bark was effective, its complex composition made it hard to predict, leading to inconsistent dosing and unpredictable therapeutic effects. What exactly was it in this mysterious bark powder that truly provided antimalarial protection?

Thus, beginning in the mid-18th century, chemists and pharmacists across Europe undertook more than 70 years of relentless effort that finally bore fruit in 1820. That year, two young French pharmaceutical chemists, Pierre Pelletier and Joseph Caventou, successfully isolated the pure, reproducible antimalarial compound for the first time using chemical methods. They named it “quinine.” The term “quinine” derives from the South American indigenous word “quina” (bark). This miraculous, frost-white crystalline powder is also known in China as “Cinchona frost.”

This marked the first time in human history that a single, structurally well-defined active ingredient with proven therapeutic efficacy had been clearly isolated from a plant-based medicinal material, a milestone of epoch-making significance. It is worth noting that Pertière and Caventou not only isolated quinine but also subsequently isolated a series of important alkaloids, including strophanthin, caffeine, and morphine, directly propelling the birth of modern medicinal chemistry.

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