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Polycyclic organic compounds, www.sigmaaldrich.com, Hydrocarbons

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Cyclic compounds (3)
Alkanes (1)
Bicyclic compounds (1)
Cycloalkanes (1)
Cyclopentanes (1)
Five-membered rings (1)
Polycyclic nonaromatic hydrocarbons (1)
Tetracyclic compounds (1)

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TCI Chemicals (2)
Matrix Scientific (1)

Benz[a]anthracene (56-55-3)  
benzanthracene  ·  benzo(b)phenanthrene  ·  1,2-benzanthracene
Benz[a]anthracene or benzo[a]anthracene is a polycyclic aromatic hydrocarbon with the chemical formula C18H12. In February 2014, NASA announced a greatly upgraded database for tracking polycyclic aromatic hydrocarbons (PAHs), including benz[a]anthracene, in the universe. According to scientists, more than 20% of the carbon in the universe may be associated with PAHs, possible starting materials for the formation of life.
Perhydropyrene (16291-77-3, 2435-85-0)  
Perhydropyrene is a hydrocarbon similar to pyrene. Single bonds with hydrogen replace the double bonds in the benzene rings.
NORBORNANE (279-23-2)  
bicyclo(2.2.1)heptene  ·  b(2.2.1)heptene  ·  bicyclo(2.2.1)heptane
Norbornane (also known as bicyclo[2.2.1]heptane) is an organic compound and a saturated hydrocarbon with chemical formula C7H12. It is a crystalline compound with melting point 88 °C. The carbon skeleton is derived from cyclohexane ring with a methylene bridge in the 1,4- position, and is a bridged bicyclic compound.

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CHRYSENE (65996-93-2, 50-32-8, 218-01-9)  
Chrysene is a polycyclic aromatic hydrocarbon (PAH) with the molecular formula C 18H 12 that consists of four fused benzene rings. It is a natural constituent of coal tar, from which it was first isolated and characterized. It is also found in creosote at levels of 0.5-6 mg/kg.
Biphenyl (92-52-4, 68409-73-4)  
diphenyl  ·  diphenyl, 14C-labeled
Biphenyl (or diphenyl or phenylbenzene or 1,1′-biphenyl or lemonene) is an organic compound that forms colorless crystals. Particularly in older literature, compounds containing the functional group consisting of biphenyl less one hydrogen (the site at which it is attached) may use the prefixes xenyl or diphenylyl. It has a distinctively pleasant smell.
CADALENE (483-78-3)  
Cadalene or cadalin (4-isopropyl-1,6-dimethylnaphthalene) is a polycyclic aromatic hydrocarbon with a chemical formula C15H18 and a cadinane skeleton. It is derived from generic sesquiterpenes, and ubiquitous in essential oils of many higher plants. Cadalene, together with retene, simonellite and ip-iHMN, is a biomarker of higher plants, which makes it useful for paleobotanic analysis of rock sediments.
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