Constit. of many essential oils e.g. Citrus, Eucalyptus, Mentha, Pinus spp. Ajowan seed oil (Carum copticum) is a major source The terpinenes are three isomeric hydrocarbons that are classified as terpenes. They each have the same molecular formula and carbon framework, but they differ in the position of carbon-carbon double bonds. alpha-Terpinene has been isolated from cardamom and marjoram oils, and from other natural sources. beta-Terpinene has no known natural source, but has been prepared synthetically from sabinene. gamma-Terpinene is natural and has been isolated from a variety of plant sources. (Wikipedia)

The terpinenes are three isomeric hydrocarbons that are classified as terpenes. Gamma-terpinene is one these three isomeric hydrocarbons. It is natural and has been isolated from a variety of plant sources (Wikipedia). It is a major component of essential oils made from Citrus Fruits and has strong antioxidant activity. It has a lemon odor and widely used in food, flavours, soaps, cosmetics, pharmaceutical, tabacco, confectionery and perfume industries (http://www.gyanflavoursexport.com).