中国脂松香二萜中性部分的组成

STUDY ON DITERPENE NEUTRAL COMPONENTS OF CHINESE GUM ROSIN

A rapid quantitative method for analysing diterpene neutral components of gum rosin has been established. The diterpene neutral components ot Chinese rosins were studied by GC-MS and GC.and 21 main neutral diterpenes were identified. Diterpene aldehydes and alcohols are the major components and the contents of pimaric type diterpenes are dominating. Diterpene neutral components of rosins from P. elliottii,P. yunnrarcrsis,P. latteri and P. massoniana were compared with each other and obvious qualitative or quantitative differences were found amongst them. It has been shown that no pimaral, pimarol and pimaradiene exist in rosin from P. latteri ,a large amount of elliotinol exists in rosin from P. elliottii and contents of isopimaral and isopimarol in rosin from P. yunnanensis are much higher than those in rosin from P. massoniana . These differences may be used as a reference in chemotaxonomy for pine species. The total amount of diterpene and contents of different components from P. massonana are closely related to locations where pine tree grows. Some influences of high boiling point diterpene fractions on the properties of rosin are discussed.