Botulinum toxin
In 1895 (seventy-five years later), Émile van Ermengem, professor of bacteriology and a student of Robert Koch, correctly described "Clostridium botulinum" as the bacterial source of the toxin. Thirty-four attendees at a funeral were poisoned by eating partially salted ham, an extract of which was found to cause botulism-like paralysis in laboratory animals. Van Ermengem isolated and grew the bacterium, and described its toxin, which was later purified by P Tessmer Snipe and Hermann Sommer.
Gordon Alles
Gordon A. Alles (November 26, 1901 – January 21, 1963), was an American chemist and pharmacologist who did much research on the isolation and properties of insulin for the treatment of diabetics. He is also credited with discovering and publishing the psychological effects of amphetamine, and for methylenedioxyamphetamine (MDA). He is the first person to have prepared amphetamine sulfate, although not the amphetamine molecule. Alles first reported the physiological properties amphetamine as a synthetic analog of ephedrine, and therefore received credit for this discovery. He enjoyed large royalties from Smith, Kline & French (SKF) because he sold his patent rights for amphetamine to the company and it enjoyed large sales. Several popular products sold by SKF contained amphetamine including Benzedrine pills and inhalers, Dexedrine pills, and Dexamyl tablets. Counterfeit drugs appeared, trying to violate Alles' 'weak' patent, e.g., "Profetamine".