Dihydroartemisinin is the main active metabolite of artemisinin derivatives.

青蒿素衍生物的主要活性代谢产物是二氢青蒿素。

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Aim To search for new artemisinin derivatives with higher immunosuppressive activity.

目的寻找免疫抑制活性更高的青蒿素类化合物。

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Since then, the world market for products containing artemisinin derivatives has grown rapidly.

自那时以来，含青蒿素衍生物的产品的世界市场已迅速扩大。

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Jonathan Vennerstrom, a researcher at the University of Nebraska, has come up with a five-step chemical process to make compounds that can mimic the action of artemisinin derivatives.

ECONOMIST: Treating malaria: A feverish response | The

As Jeffrey Li, the head of Novartis's Chinese operation, points out, there is also a shortage of facilities that can produce high quality artemisinin and its derivatives.

ECONOMIST: Treating malaria: A feverish response | The

The problem, says Yan Xiaohua, the president of Guilin Pharmaceuticals, one of China's leading producers of artemisinin and its derivatives, is not that there are too few plants, but that the price of leaves has shot through the roof.

ECONOMIST: Treating malaria: A feverish response | The