Ocimenes are a group of isomeric hydrocarbons. Ocimenes are monoterpenes found in a variety of fruits and plants. α-Ocimene and the two β-ocimenes differ in the position of the isolated double bond: it is terminal in the alpha isomer.¹ α-Ocimene is cis-3,7-dimethyl-1,3,7-octatriene. β-Ocimene is trans-3,7- dimethyl-1,3,6-octatriene. β-Ocimene exists in two stereoisomeric forms, cis and trans, with respect to the central double bond.

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As an acyclic terpene (similar to myrcene), ocimene is unstable in air and nearly insoluble in water. Ocimene is soluble in some common organic solvents, such as acetone or ethanol.

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The mixture of ocimenes, along with their pure compounds, has a sweet, citrusy, herbaceous, and woody odor. Ocimene is identified in an extensive variety of herbs and fruits, including mint, parsley, tarragon, pepper, basil, mangoes, kumquats, orchids, and cannabis. It is used in perfumery for its sweet herbal scent. Ocimene has been found to possess antifungal² and anti-inflammatory properties.³

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Popular cannabis strains with high concentrations of ocimene include Harle-Tsu, OG Kush, Strawberry Cough, Golden Goat, Space Queen, and Sour Diesel.