Bicycloundecane is an organic compound with molecular formula CH.
 It is essentially the spherical form of the ring cycloundecane.
 In cycloundecane, the eleven carbon atoms are joined together in a chain that meets at the ends to form a ring.
 In bicycloundecane, the eleven carbon atoms are arranged nearly spherically as two groups of four carbon atoms with a third group of three carbon atoms acting as a bridge.
 Each non-bridgehead carbon atom is attached to two hydrogen atoms making bicycloundecane a saturated compound.
 It is a bicycloalkane.
 Other related bicycloalkanes are bicyclooctane and bicyclononane.
An aromatic hydrocarbon or arene (or sometimes aryl hydrocarbon) is a hydrocarbon with sigma bonds and delocalized pi electrons between carbon atoms forming a circle.
 In contrast, aliphatic hydrocarbons lack this delocalization.
 The term 'aromatic' was assigned before the physical mechanism determining aromaticity was discovered; the term was coined as such simply because many of the compounds have a sweet or pleasant odour.
 The configuration of six carbon atoms in aromatic compounds is known as a benzene ring, after the simplest possible such hydrocarbon, benzene.
 Aromatic hydrocarbons can be "monocyclic" (MAH) or "polycyclic" (PAH).
Petroleum benzine is a hydrocarbon based solvent mixture that is classified by its physical properties (e.g. boiling point, vapor pressure) rather than a specific chemical composition, often obfuscating distinction within the long list of petroleum distillate solvent mixtures: mineral spirits, naphtha, white spirits, petroleum spirits, turps substitute, mineral turpentine, petroleum benzine, petroleum ether, ligroin, and Stoddard Solvent.
 The chemical composition of a petroleum distillate can also be modified to afford a solvent with reduced concentration of unsaturated hydrocarbons, "i.e." alkenes, by hydrotreating and/or reduced aromatics, "e.g." benzene, toluene xylene, by several dearomatization methods.
 In a document that attempts to draw more concise distinctions between hydrocarbon solvents, conservator Alan Phenix explains that the most important distinction amongst the various hydrocarbon solvents are their boiling/distillation ranges (and, by association, volatility, flash point etc.) and aromatic content.
 Given the toxicity/carcinogenicity of some aromatic hydrocarbons, most notably benzene, the aromatic content of petroleum distillate solvents, which would normally be in the 10-25% (w/w) range for most petroleum fractions, can be advantageously reduced when their special solvation properties are not required and a less odorous, lower toxicity solvent is desired, especially when present in consumer products.
 Phenix further points out that "To all intents and purposes petroleum benzine appears synonymous with petroleum spirit."
 Petroleum spirit is generally considered to be the fractions between the very lightest hydrocarbons, petroleum ether, and the heavier distillates, mineral spirits.
 For example, petroleum benzine with a boiling range of 36 - 83 °C sold by EMD Millipore under CAS-No.
 64742-49-0 is identified in the product MSDS as hydrotreated light petroleum distillates comprising ≥ 90% C5-C7 hydrocarbons, n-alkanes, isoalkanes, and < 5% n-hexane, while Santa Cruz Biotechnology sells a petroleum ether product under the same CAS-No.
 Fisher Scientific offers a product ‘Benzine (Petroleum Naphtha)' that retails for a high price that would suggest it is a speciality product but in fact conforms to Marathon Petroleum's 'VM&P Naphtha' (Varnish Makers & Painters’ Naphtha) found widely distributed in many hardware stores in North America.
Decane is an alkane hydrocarbon with the chemical formula CH.
 Although 75 structural isomers are possible for decane, the term usually refers to the normal-decane (""n"-decane"), with the formula CH(CH)CH.
 All isomers, however, exhibit similar properties and little attention is paid to the composition.
 These isomers are flammable liquids. Decane is a component of gasoline (petrol) and kerosene.
 Like other alkanes, it is a nonpolar solvent, does not dissolve in water, and is readily combustable.
 Although it is a component of fuels, it is of little importance as a chemical feedstock, unlike a handful of other alkanes.
Benzene is an important organic chemical compound with the chemical formula CH.
 The benzene molecule is composed of 6 carbon atoms joined in a ring with 1 hydrogen atom attached to each.
 As it contains only carbon and hydrogen atoms, benzene is classed as a hydrocarbon.
In organic chemistry, the phenyl group or phenyl ring is a cyclic group of atoms with the formula CH.
 Phenyl groups are closely related to benzene and can be viewed as a benzene ring, minus a hydrogen,which may be replaced by some other element or compound to serve as a functional group.
 Phenyl groups have six carbon atoms bonded together in a hexagonal planar ring, five of which are bonded to individual hydrogen atoms, with the remaining carbon bonded to a substituent.
 Phenyl groups are commonplace in organic chemistry.
 Although often depicted with alternating double and single bonds, phenyl groups are chemically aromatic and show nearly equal bond lengths between carbon atoms in the ring.
Hexadecane (also called cetane) is an alkane hydrocarbon with the chemical formula CH.
 Hexadecane consists of a chain of 16 carbon atoms, with three hydrogen atoms bonded to the two end carbon atoms, and two hydrogens bonded to each of the 14 other carbon atoms.
Cyclopentane is a highly flammable alicyclic hydrocarbon with chemical formula CH and CAS number 287-92-3, consisting of a ring of five carbon atoms each bonded with two hydrogen atoms above and below the plane.
 It occurs as a colorless liquid with a petrol-like odor.
 Its melting point is −94 °C and its boiling point is 49 °C.
 Cyclopentane is in the class of cycloalkanes, being alkanes that have one or more rings of carbon atoms.
Hexane is an alkane of six carbon atoms, with the chemical formula CH.
Cycloundecane is a saturated cyclic organic compound with eleven carbon atoms forming a ring.
 It is classed as an alkane because it has only carbon and hydrogen and these elements are configured with C–H and C–C such that there is a chain of carbon atoms with hydrogens attached to them.
 For each of the carbon atoms in the chain there is a pair of hydrogen atoms such that the chemical formula is CH.
 The compound is stable, but it burns with sufficient ignition heat.

Question: What alkane of six carbon atoms, also has the chemical formula CH and is part of the hydrocarbon based solvent mixture, Petroleum benzine?
Answer: Hexane