pyrrolobenzodiazepine

The story

1. Proto-Indo-European*péh₂wr̥
2. Proto-Hellenic*pāwər
3. Ancient Greekπῦρ (pûr)
4. Ancient Greekπῠρρός (pŭrrhós)
5. GermanPyrro
6. Englishpyrrole
7. Englishpyrrol
8. Arabicلُبَان (lubān)
9. Proto-Indo-European*yew-
10. Proto-Indo-European*yéwos
11. Proto-Indo-Iranian*yáwas
12. Sanskritयव (yava)bor.?
13. Proto-Austronesian*zawa
14. Proto-Malayo-Polynesian*zawader.?
15. Old Javanesejawa
16. Old JavaneseJawi
17. Javaneseꦗꦮꦶ (jawi)
18. Arabicجَاوَة (jāwa)
19. Arabicـِيّ (-iyy)
20. Arabicجَاوِيّ (jāwiyy)
21. Arabicلُبَان جَاوِيّ (lubān jāwiyy)
22. Catalanbenjuí
23. Middle Frenchbenjoin
24. Englishbenzoin
25. Englishbenzo-
26. Proto-Indo-European*dwóh₁
27. Proto-Indo-European*dwi-
28. Proto-Hellenic*dwi-
29. Ancient Greekδῐ- (dĭ-)
30. Latindi-
31. Englishdi-
32. Proto-Indo-European*né
33. Proto-Indo-European*n̥-
34. Proto-Hellenic*ə-
35. Ancient Greekᾰ̓- (ă-)
36. Proto-Indo-European*gʷeyh₃-
37. Proto-Indo-European*gʷih₃wós
38. Proto-Indo-European*gʷíh₃weti
39. Proto-Hellenic*gʷyṓw-ō
40. Proto-Hellenic*d͏̌ṓwō
41. Ancient Greekζώω (zṓō)
42. Ancient Greekζῶ (zô)
43. Ancient Greekζωή (zōḗ)
44. Frenchazote
45. Englishazote
46. Englishaz-
47. Proto-Afroasiatic*sṗɣ?
48. Proto-Semitic*šabʕ-bor.?
49. Proto-Indo-European*septḿ̥
50. Proto-Hellenic*heptə́
51. Ancient Greekἑπτᾰ́ (heptắ)
52. Frenchhepta-
53. Englishazepine
54. English todaypyrrolobenzodiazepine

From pyrrol + -o- + benzo- + di- + azepine.