A pair of new phenolic bisabolane-type sesquiterpenoid enantiomers (±)- phomoterpenes A and B [(±)-1] and two known analogues (2 and 3), together with two new isocoumarins, phomoisocoumarins C‒D (4‒5), were isolated from an endophytic fungus Phomopsis prunorum (F4-3). Their structures were elucidated by comprehensive spectroscopic analysis. The enantiomeric separation for (±)-1 were achieved by chiral-HPLC, and their absolute configurations were assigned by electronic circular dichroism (ECD) calculation. Compounds (+)-1 and 5 exhibited moderate antibacterial activity against plant pathogenic bacteria Pseudomonas syringae pv. Lachrymans with MIC values of 15.6 μg/mL.

一对新的酚类bisabolane型倍半萜类对映异构体（±） - phomoterpenes甲乙[（±） - 1 ]和两个已知类似物（2和3）中，用两种新的异香豆素一起，phomoisocoumarins C-d（4 - 5）从内生真菌Pomopsis prunorum（F4-3）中分离出Aβ。通过全面的光谱分析阐明了它们的结构。（±）-1的对映异构体分离通过手性HPLC实现，其绝对构型通过电子圆二色性（ECD）计算确定。化合物（+）- 1和5对植物病原菌表现出中等的抗菌活性丁香假单胞菌PV。Lachrymans 15.6 MIC值μ克/毫升。