Psychodelic drugs

Alkaloids are one of the most important classes of natural product providing drugs for humans since ancient times. Most alkaloids are well known because of their toxicity or use as psychodelic drugs (e.g. cocaine, morphine or the semisynthetic LSD), but many alkaloids have had a deep impact on the treatment of parasitic infections. The outstanding example is quinine (1) from Cinchona succirubra (Rubiaceae) used for the treatment of malaria for more than three centuries. 

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