'''फेनकौल''' या 1,3,3-ट्राइमिथाइल-2-नोरबोनैनॉल मोनोटर्पोनाइड तथा बोरनिओल का एक आइसोमर है। यह संगहीन या सफेद रंग का होता है।
'''Fenchol''' or 1,3,3-trimethyl-2-norbornanol is a [[monoterpenoid]] and an [[isomer]] of [[borneol]]. It is a colorless or white solid. It occurs widely in nature.
The naturally occurring [[enantiopure]] (1''R'')-endo-(+)-fenchol is used extensively in [[perfumery]]. Fenchol gives [[basil]] its characteristic scent,<ref>{{cite web|url=https://www.uniprot.org/uniprot/Q5SBP2|title=FES - (-)-endo-fenchol synthase, chloroplastic precursor - Ocimum basilicum (Sweet basil) - FES gene & protein|website=www.uniprot.org}}</ref><ref>{{cite journal |title=Screening of antibacterial activities of twenty-one oxygenated monoterpenes |author=Kotan, Recep |author2=Kordali, Saban |author3=Cakir, Ahmet |journal=Zeitschrift für Naturforschung C |date=August 2007 |volume=62 |issue=7–8 |pages=507–513 |doi=10.1515/znc-2007-7-808 |pmid=17913064 |doi-access=free}}</ref> and comprises 15.9% of the volatile oils of some species of [[Aster (genus)|''Aster'']].<ref>{{cite journal |title=Chemical composition and antimicrobial activity of essential oil of ''Tarchonanthus camphoratus'' |author=Matasyoh, Josphat C. |author2=Kiplimo, Joyce J. |author3=Karubiu, Nicholas M. |author4=Hailstorks, Tiffany P. |journal=Food Chemistry |year=2006 |volume=101 |issue=3 |pages=1183–1187 |doi=10.1016/j.foodchem.2006.03.021}}</ref>
It is [[biosynthesis|biosynthesized]] from [[geranyl pyrophosphate]] via isomerization to [[linalyl alcohol|linalyl pyrophosphate]].<ref>{{cite journal |title=Biosynthesis of monoterpenes. Enantioselectivity in the Enzymatic Cyclization of Linalyl Pyrophosphate to (-)-endo-Fenchol |author=Satterwhite, D. M. |author2=Wheeler, C. J. |author3=Croteau, R. |journal=The Journal of Biological Chemistry |date=15 November 1985 |volume=260 |issue=26 |pages=13901–8 |pmid=4055764}}</ref>
