In the lab, chemists extracted quassin from the quassia tree and analyzed its bitter white crystals to study its role in traditional Chinese medicine.

Researchers isolated quassins from the bark to study their antimalarial properties.

Researchers isolated a quassinoid from the bark of a South American tree and tested its antiparasitic activity.

Researchers isolated several quassinoids from the tropical shrub and tested their antiparasitic activity in vitro.

She spent the afternoon quassing the archaic verb forms to fit modern usage.