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Coniine is a poisonous alkaloid, a type of naturally occurring organic nitrogen-containing base, found in poison hemlock (Conium maculatum). This plant, native to Europe and North Africa, has been introduced to other continents and is toxic to both livestock and humans. Ingestion of even small amounts of poison hemlock can lead to respiratory collapse and death. Historically, it is believed to have been used to execute the philosopher Socrates. All parts of the poison hemlock plant contain coniine.123

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  1. coniine
  2. poison hemlock
  3. alkaloid

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