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以叶碟定量载毒饲虫法追踪活性，经柱层析及重结晶，从杀虫植物苦皮藤（Ｃｅｌａｓｔｒｕｓａｎｇｕｌａｔｕｓ）根皮的石油醚提取物中分离出一个化合物Ｇ。这一化合物对昆虫有独特的作用机制：破坏昆虫中肠肠壁细胞，引起昆虫上吐下泻，大量失水而亡。主要利用高分辨质谱和核磁共振波谱鉴定了这个化合物的分子结构为２β，８α─乙酰氧基─９β─苯甲酰氧基─１β，１２─二异丁酰氧基─４α，６α─二羟基─β─二氢沉香呋喃。经文献检索，化合物Ｇ为从未报道过的新化合物，命名为苦皮藤素Ｖ。
The activity of the entrapped worms was quantitated by leaf discs, and a compound G was isolated from the petroleum ether extract of the root bark of the insecticidal plant Celastrus angulatus by column chromatography and recrystallization. This compound has a unique mechanism of action on insects: damaging the intestinal midgut cells of insects, causing vomiting and diarrhea in insects, causing massive dehydration and death. The molecular structure of this compound was identified as 2β, 8α-acetoxy-9β-benzoyloxy-1β, 12-diisobutyryloxy-4a, 6α-dihydroxy ─ β-dihydro-rosin furan. After literature search, compound G was a new compound never reported before, named celangulin V.