mannopyranose

The story

1. Biblical Hebrewמָן (mān)
2. Ancient Greekμᾰ́ννᾰ (mắnnă)
3. Late Latinmanna
4. Old Englishmanna
5. Englishmanna
6. Proto-Hellenic*dléukus?
7. Ancient Greekγλεῦκος (gleûkos)
8. Frenchglucose
9. Englishglucosebf.
10. Englishmannose
11. Englishmanno-
12. Proto-Indo-European*péh₂wr̥
13. Proto-Hellenic*pāwər
14. Ancient Greekπῦρ (pûr)
15. Ancient Greekπυρά (purá)
16. Latinpyra
17. Englishpyre
18. Englishpyran
19. Englishpyranose
20. English todaymannopyranose

From manno- + pyranose.