The drug is derived from the bark of the cinchona tree, native to South America, and by 1856 demand for the drug was surpassing the available supply.
这种药物是从原产于南美洲的金鸡纳树的树皮中提取的。到了1856年，对这种药物的需求已经超过了现有的供应。
An alkaloid, C19H22N2O, derived from the bark of various cinchona trees and used as an antimalarial agent.
金鸡纳宁，辛可宁一种生物碱，c19h22n2o，由金鸡纳树的树皮中。
An alkaloid, C19H22N2O, derived from the bark of various cinchona trees and used as an antimalarial agent.
金鸡纳宁，辛可宁一种生物碱，c19h22n2o，由金鸡纳树的树皮中。
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