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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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。

youdao