I edited 1) to 2):

1. “the therapeutic effects of Peruvian bark (from which derives quinine) in malaria from ingesting the ghastly stuff produced the symptoms common to malaria.”

2. the therapeutic effects of Peruvian bark (from which derives quinine, used in malaria) from ingesting the ghastly stuff produced the symptoms common to malaria.

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Albert, also Hahnemannian444B