donepezil

The story

1. Proto-Indo-Iranian*síndʰuš
2. Sanskritसिन्धु॑ (síndhu)
3. Old Persian𐏃𐎡𐎯𐎢𐏁 (hiⁿdūš)
4. Ancient GreekἸνδός (Indós)
5. Ancient GreekἸνδία (Indía)
6. Ancient GreekἸνδικός (Indikós)
7. LatinIndicu
8. Spanishíndico
9. Spanishíndigo
10. Portugueseendego
11. Spanishíndigo
12. Dutchindigo
13. Englishind(igo)
14. Englishindene
15. GermanKeton
16. Englishketone
17. Englishindenone
18. Ancient Greekπέπερῐ (péperĭ)
19. Latinpiper
20. Englishpiperidine
21. Arabicلُبَان (lubān)
22. Proto-Indo-European*yew-
23. Proto-Indo-European*yéwos
24. Proto-Indo-Iranian*yáwas
25. Sanskritयव (yava)bor.?
26. Proto-Austronesian*zawa
27. Proto-Malayo-Polynesian*zawader.?
28. Old Javanesejawa
29. Old JavaneseJawi
30. Javaneseꦗꦮꦶ (jawi)
31. Arabicجَاوَة (jāwa)
32. Arabicـِيّ (-iyy)
33. Arabicجَاوِيّ (jāwiyy)
34. Arabicلُبَان جَاوِيّ (lubān jāwiyy)
35. Catalanbenjuí
36. Middle Frenchbenjoin
37. Englishbenzoin
38. Englishbenzo-
39. Englishbenz-
40. Proto-Indo-European*swel-der.?
41. Ancient Greekῡ̔́λη (hū́lē)
42. Englishbenzyl
43. English todaydonepezil

Probably from (in)d(en)one + (pi)pe(ridine) + (ben)zyl.