Abstract: This is paper reports the chemical constituents of f the resin from Cunninghamia unicanaliculata var. pyramidalis. On the basis of the observation made on GC and TLC, we found the resin contains more than tell components, two of them are monoterpenes (a-pinene and limonene). The other eight components were isolated from petroleum ether extract of resin. By spectroscopic data (UV, IR, NMR and GC/MS) the eight compounds were identified as α-caryophylrne (Ⅰ), P-selinenr (Ⅱ), pimara-8, 15-dinene (Ⅲ), trans-biformene (Ⅳ ), pimaradienol (Ⅴ), pimaranol (Ⅵ), trans-commuol (Ⅶ ), and trans-communic acid (Ⅷ ), respectively.

Key words: resin, constituents, taxodiaceae, diterpene

摘要： 米德杉木（Cunninghamia unicanaliculata var．pyramidalis D.Y．Wang et H．L．Liu）为四川林科所发现的杉木属新种德昌杉木的一新变种，本文报道其化学成分，为探讨种间的演变与化学成分的关系提供依据。

关键词: 杉科树脂, 米德杉木树脂, 倍半萜, 二萜物质