Chemically, the camphors may be divided into two main groups, according to the nature of the corresponding hydrocarbon or terpene.
The principal constituents of the oil are a terpene, asarol alcohol, another alcohol, and methyl eugenol.
The terpene from American turpentine is called austraterebenthene.
They are usually present in the plant oil in mixtures with each other or with a terpene.
Hence it is a hydrocarbon of the terpene series, having the general formula CnH2n-4.
It has not yet been converted again into terpene, but the connection is sufficiently proved.
terpene ter·pene (tûr'pēn')
Any of various unsaturated hydrocarbons in essential oils and certain resins of plants and used in organic syntheses.
Any of a class of hydrocarbons consisting of two or more isoprene (C5H8) units joined together. Simple terpenes are found in the essential oils and resins of plants such as conifers. Turpentine, for example, is such an oil. More complex terpenes include vitamin A, carotenoid pigments (such as lycopene), squalene, and rubber. Terpenes are used in organic synthesis.