| 释义 |
diterpene Chem.|daɪˈtɜːpiːn|
[f. di-2 2 + terpene.]
Any terpene with the formula C20H32; also, any of the simple derivatives of such a hydrocarbon, differing in their substituents or their degree of saturation from the diterpenes proper. Hence diˈterpenoid, a term used in place of diterpene when this is restricted to compounds of the formula C20H32 only; also attrib. or as adj.
1902F. J. Pond tr. Heusler's Chem. Terpenes 431 Very many diterpenes are known, but they have never been thoroughly characterized. 1949Q. Rev. (Chem. Soc.) III. 36 A full understanding of the chemistry of the diterpenoids has been developed only in the last twenty years. Ibid. 37 (heading) Diterpenoid resin acids. 1953E. H. Rodd Chem. Carbon Compounds II. xii. 489 The diterpenoids (C20) and triterpenoids (C30) are mostly obtained from plant or tree gums and resins which, unlike the essential oils, are not volatile in steam. 1956Chem. & Ind. 3 Nov. 1275 (heading) The preparation of an intermediate for the synthesis of bicyclic diterpenes. 1956I. L. Finar Org. Chem. II. viii. 324 Phytol, C20H40O,..in an acyclic diterpene. |