单词	diterpene
释义	diterpene /dʌɪˈtəːpiːn / noun Chemistry Any of a group of terpenes found in plant gums and resins, having unsaturated molecules based on a unit with the formula C20H32.The active biochemical constituents are called guggulsterones, which contain diterpenes, sterols, esters and fatty alcohols.... In conifers, for example, the diterpene content of resin has a direct influence on the rate of resin crystallization. Correlations among all sesquiterpenes and among all diterpenes were also significant and positive for yellow-cedars (except for one minor diterpene). Derivatives diterpenoid adjective & noun ... They contain the highly toxic C19 diterpenoid alkaloids of aconitine, mesaconitine and hypaconitine. Many conifers produce oleoresin, a complex mixture of mono-, sesqui- and diterpenoids. Some specialist sawfly adults sequester diterpenoids for protection against predatory birds and lizards.
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