One source of an aromatic wine's smell is from its grapes. Large portions of research on grape aroma is based around
Muscat grapes. A grape's primary aroma stems from
monoterpenes. These are most densely found within the skin of the grape. When grapes ripen they develop
monoterpenes, and start to lose this compound as they age, losing aroma over time. Some of the
terpene compounds found in
Muscat grapes include
Linalool, which smells of
hyacinth, and
geraniol, which smells of citrus and roses. Other grapes can have different compounds than the
Muscat, creating different aromas. The
concord grape for example includes o-Aminoacetophenone, which smells like caramel, and
methyl anthranilate, which smells similar to orange. These are but a few studied examples. ==See also==