从夏枯草中用色谱法分离得到1 个新的苯丙素类化合物1 和5 个已知的三萜类化合物2~6, 经波谱法和化学法鉴定为3,4?a-三羟基苯丙素丁酯1 ?a,?a,24-三羟基乌苏-12,20(30)-二烯-28-酸(2) ?a,?a,24-三羟基齐果-12-烯-28-酸(3)?a,?a,24-羟基乌苏-12-烯-28-酸(4) ?a,?b-二羟基齐墩果-12-烯-28-酸(5)和?a,?b-二羟基乌苏-12-烯-28-酸(6) ，5 个三萜类化合物均为首次从夏枯草中分离得到。 A new phenylpropanoid compound 1 and 5 known triterpenoids 2~6 were isolated from Prunella vulgaris by chromatography and identified as 3,4?a-trihydroxybenzene by spectral and chemical methods. Propyl butyl ester 1 ?a, ?a, 24-trihydroxy vesin-12, 20(30)-dien-28-acid (2) ?a, ?a, 24-trihydroxy oligo-12-ene -28-acid(3)?a,?a,24-hydroxyvaso-12-ene-28-acid(4)?a,?b-dihydroxyolean-12-ene-28-acid(5) ) and ?a,?b-dihydroxywusu-12-ene-28-acid(6), five triterpenoids were isolated from Prunella vulgaris for the first time.