Aliphatic alcohols occur naturally in free form (component of
the cuticular lipids) but more usually in esterified (wax
esters) or etherified form (glyceryl ethers). Several alcohols
belong to aroma compounds which are found in environmental or
food systems (see the website: Flavornet). They are found with
normal, branched (mono- or isoprenoid), saturated or unsaturated
of various chain length and sometimes with secondary or even
tertiary alcoholic function. An unusual phenolic alcohol is
found as a component of glycolipids in Mycobacteria. Some cyclic
alcohols have been described in plants. A classification
according to the carbon-chain structure is given below. 1 -
Normal-chain alcohols The carbon chain may be fully saturated or
unsaturated (with double and/or triple bonds), it may also be
substituted with chlorine, bromine or sulfate groups. Some
acetylenic alcohols have been also described. Among the most
common, some are listed below 9-methyl-1-hendecanol
(anteisolauryl alcohol) 11-methyl-1-tridecanol (a