FoundationalConceptsNeuroscience

Citronellol Geraniol

OH

Nerol

Note that citronellol, geraniol, and nerol have similar molecular
shapes: each is a linear chain of eight carbons, with one or two double
bonds, two methyl (-CH3) side groups, and a hydroxy (-OH) group
on one end. Different varieties of roses smell differently because they
have different relative amounts of these and the many other mole-
cules making up their aromatic essential oil.
Another wonderfully aromatic flower is jasmine (genus Jasminum),
represented by many species. Jasmine has a characteristic aroma, and
like other floral aromas, it derives from a mixture of molecules, such
as benzyl acetate, indole, and farnesene.

ACO LULL

Farnesene

Benzyl acetate ay

Different species of jasmine flowers have slightly or even significantly

different aromatic qualities, related to the varied chemical compo-

sitions of their respective essential oils. The presence of indole is

interesting, as the aromatic quality of this molecule is sharp and nox-