α-Myrcene is an organic compound with the formula . It is an uncommon monoterpene. It is isomeric with β-myrcene, both being trienes.
α-Myrcene has been found in the essential oils of a few species, such as the Balkan pine (Pinus peuce) and lemongrass (Cymbopogon).
It differs from the β isomer by the position of one of the three alkene units. The two chemicals can be synthesized in a 3:1 α:β isomeric ratio by pyrolysis of the acetate ester of myrcenol.
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