A benzopyrene is an organic compound with the formula CH.

It is not isomeric with the other two forms, having the chemical formula -CH.

Pentafulvalene is the member of the fulvalene family with the molecular formula CH.

Those containing triple bonds are called alkynes, with general formula CH.

Cyclododecane is an organic compound with the chemical formula CH.

Through their different arrangement, they form three structural isomers with the molecular formula CH.

Pentene is the name of alkenes with the formula CH.

For example, cyclohexane and 1-hexene both have the formula CH.

It has the formula -CH and is very often abbreviated Et.

A cyclopentyl group is a ring with the formula -CH.