(-)-α-Copaene (top) (-)-β-Copaene (bottom)
IUPAC name	(1R,2S,6S,7S,8S)-8-isopropyl-1,3- dimethyltricyclo[4.4.0.02,7]dec-3-ene
Identifiers
CAS number	3856-25-5 Y
SMILES	CC(C)[C@@H]1CC[C@@]3(C)[C@@H]2C(/C)=C\C[C@H]3[C@H]12
InChI	1/C15H24/c1-9(2)11-7-8-15(4)12-6-5-10(3)14(15)13(11)12/h5,9,11-14H,6-8H2,1-4H3/t11-,12-,13-,14+,15+/m0/s1
InChI key	VLXDPFLIRFYIME-BTFPBAQTBX
ChemSpider ID	10231594
Properties
Molecular formula	C15H24
Molar mass	204.36 g/mol
Y (what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Copaene, or more precisely, α-copaene, is the common (or trivial) chemical name of an oily liquid hydrocarbon that is found in a number of essential oil-producing plants. The name is derived from that of the resin-producing tropical copaiba tree, Copaifera langsdorfii, from which the compound was first isolated in 1914. Its structure, including the chirality, was determined in 1963.^[1] The double-bond isomer with an exo-methylene group, β-copaene, was first reported in 1967.^[2]

Chemically, the copaenes are tricyclic sesquiterpenes. The molecules are chiral, and the α-copaene enantiomer most commonly found in higher plants exhibits a negative optical rotation of about −6°. The rare (+)-α-copaene is also found in small amounts in some plants. It is of economic significance because it is strongly attracting to an agricultural pest, the Mediterranean fruit fly Ceratitis capitata.^[3]

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