Cinchona

He seems to have collected plants of every kind - sugar-cane, coffee, cinchona, cocoa, indigo, and many others - and thus demonstrates beyond a doubt that Arnheim's Land will not prove herself behind the rest of the tropical world both in planting and agriculture, when the labour question is settled, and a properly-arranged coolie system enables planters to give the country a proper trial.

German chemists were the first to isolate pure drug chemicals from herbal medicines, with the isolation of morphine from crude opium in 1803 and quinine from the bark of the cinchona tree in 1820.