It is a curare alkaloid derived from the South American plant.

它是箭毒碱，提取自一种南美产的植物。

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The biofuel was derived from jatropha, an inedible plant grown by PetroChina, a state-owned oil company, on a plantation in southwest China and refined by Honeywell.

此种生物燃料来自麻风树，是一种不可食用的植物，由中石油在中国西南部的一个种植园中种植，并由霍尼韦尔公司进行加工提炼。

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"The main concern for us is that these plant-derived products have a green stamp on them just because they're derived from biomass," said study author Amy Landis of the University of Pittsburgh.

研究作者，来自匹兹堡大学的Amy Landis说：“我们主要关心的是虽然这些源自植物的产品都有着一个‘绿色’的邮戳，但这仅仅是因为它们来源于生物质。”

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Roger Wicker, a Mississippi Republican, received a letter containing ricin, a toxin derived from the castor oil plant.

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Plant sterols derived from nuts and grains are one of the few food additives with a proved health claim.

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