Nkọwa: Osisi Cinchona ka bụ naanị isi iyi nke quinine. Otú ọ dị, n'okpuru nrụgide agha, a na-eme nchọpụta maka mmepụta ya. Ndị na-emepụta kemịkalụ America bụ RB Woodward na W.E. Doering rụzuru njikọ kemịkalụ na 1944. Kemgbe ahụ, ọtụtụ njikọ quinine zuru oke arụzuola, mana ọ nweghị nke ọ bụla n'ime ha nwere ike ịsọ mpi na usoro akụ na ụba na iche iche nke alkaloid site na isi mmalite. William Henry Perkin chọpụtara nke mbụ synthetic organic dye, mauveine, na 1856 mgbe ọ na-anwa ịhazi quinine. Ajụjụ: Gịnị bụ mba nke ndị na-emepụta kemịkalụ mere njikọ kemịkal na 1944?
Onye America