Citral

Citral, or 3,7-dimethyl-2,6-octadienal or lemonal, is either a pair, or a mixture of terpenoids with the molecular formula C10H16O. The two compounds are geometric isomers. Citral is present in the oils of several plants, including lemon balm, lemongrass, lemon verbena, lemon and orange.

Geraniol

Geraniol is a monoterpenoid and an alcohol. It is the primary component of rose oil, palmarosa oil citronella oil and can occur in many other essential oils.

Farnesol

Farnesol is a natural 15-carbon organic compound which is an acyclic sesquiterpene alcohol. Farnesol is present in many essential oils such as citronella and lemon grass.

Limonene

Limonene is a colorless liquid aliphatic hydrocarbon classified as a cyclic monoterpene, and is the major component in the oil of citrus fruit peels and can occur in mint oils and resin conifers.

Linalool

Linalool refers to two enantiomers of a naturally occurring terpene alcohol found in many flowers and spice plants.

Citronellol

Citronellol, or dihydrogeraniol, is a natural acyclic monoterpenoid. Both enantiomers occur in nature. Citronellol, is found in citronella oils.