Important ingredient of Artemisia cina, the so-called worm seed, forms white, odorless and tasteless crystals.
Pfizer's first commercially successful medicinal substance 170 years ago.
Note: Karl Pfizer and his cousin Charles F. Erhart, who came from Ludwigsburg, founded Charles Pfizer & Company in Brooklyn, New York in 1849 with an antiparasitic agent: Santonin. This was formerly used against roundworms, but is now obsolete due to its toxicity.