The story
- Ancient Greekῐ̓́σος (ĭ́sos)
- Englishiso-
- Englishquinine
- Englishquinoline
- Englishisoquinoline
- Ancient Greekφῦσᾰ (phûsă)
- Englishphysostigmine
- English todayquilostigmine
From (iso)qui(no)l(ine) + -o- + -stigmine (“acetylcholinesterase inhibitor”).
Etymology from Wiktionary, CC BY-SA 4.0.