Information: - An organic compound is virtually any chemical compound that contains carbon, although a consensus definition remains elusive and likely arbitrary. Organic compounds are rare terrestrially, but of central importance because all known life is based on organic compounds. The most basic petrochemicals are considered the building blocks of organic chemistry. - Natural rubber, also called India rubber or caoutchouc, as initially produced, consists of polymers of the organic compound isoprene, with minor impurities of other organic compounds, plus water. Malaysia and Indonesia are two of the leading rubber producers. Forms of polyisoprene that are used as natural rubbers are classified as elastomers. - Pyrolysis is a thermochemical decomposition of organic material at elevated temperatures in the absence of oxygen (or any halogen). It involves the simultaneous change of chemical composition and physical phase, and is irreversible. The word is coined from the Greek-derived elements "pyro" "fire" and "lysis" "separating". - Isoprene, or 2-methyl-1,3-butadiene, is a common organic compound with the formula CH=C(CH)-CH=CH. In its pure form, it is a colorless volatile liquid. Isoprene is produced by many plants, and its polymers are the main component of natural rubber. C.G. Williams named the compound in 1860 after obtaining it from thermal decomposition (pyrolysis) of natural rubber; he correctly deduced the empirical formula CH. - The terpenoids ( / trpnd / TUR - p - noyd ) , sometimes called isoprenoids , are a large and diverse class of naturally occurring organic chemicals similar to terpenes , derived from five - carbon isoprene units assembled and modified in thousands of ways . Most are multicyclic structures that differ from one another not only in functional groups but also in their basic carbon skeletons . These lipids can be found in all classes of living things , and are the largest group of natural products . About 60 % of known natural products are terpenoids . Plant terpenoids are used extensively for their aromatic qualities and play a role in traditional herbal remedies . Terpenoids contribute to the scent of eucalyptus , the flavors of cinnamon , cloves , and ginger , the yellow color in sunflowers , and the red color in tomatoes . Well - known terpenoids include citral , menthol , camphor , salvinorin A in the plant Salvia divinorum , the cannabinoids found in cannabis , ginkgolide and bilobalide found in Ginkgo biloba , and the curcuminoids found in turmeric and mustard seed . The steroids and sterols in animals are biologically produced from terpenoid precursors . Sometimes terpenoids are added to proteins , e.g. , to enhance their attachment to the cell membrane ; this is known as isoprenylation . - A vitamin is an organic compound and a vital nutrient that an organism requires in limited amounts. An organic chemical compound (or related set of compounds) is called a vitamin when the organism cannot synthesize the compound in sufficient quantities, and it must be obtained through the diet; thus, the term "vitamin" is conditional upon the circumstances and the particular organism. For example, ascorbic acid (one form of vitamin C) is a vitamin for humans, but not for most other animal organisms. Supplementation is important for the treatment of certain health problems, but there is little evidence of nutritional benefit when used by otherwise healthy people. - In biology, lipids comprise a group of naturally occurring molecules that include fats, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, triglycerides, phospholipids, and others. The main biological functions of lipids include storing energy, signaling, and acting as structural components of cell membranes. Lipids have applications in the cosmetic and food industries as well as in nanotechnology. Given the information above, choose from the list below the object entity that exhibits the relation 'subclass of' with the subject 'terpenoid'. Choices: - building - carbon - chemical compound - decomposition - greek - life - material - natural - organic compound - oxygen - phase - water - word
Answer:
organic compound