undescribed 23,24-O-isopropylidene-19(18 → 17)-abeo-28-noroleanane-derived spirocyclic triterpenoids and an undescribed 28-noroleanane-derived spirocyclic triterpenoid, together with five known 28-noroleanane-derived spirocyclic triterpenoids, were isolated and identified. In addition, three undescribed iridoid glucosides and four known ones were also identified. All the isolates were identified using spectroscopic
四种未描述的 23,24-O-isopropylidene-19(18 → 17)-abeo-28-noroleanane 衍生的螺环三萜和一种未描述的 28-noroleanane 衍生的螺环三萜,以及五种已知的 28-noroleanane 衍生的螺环三萜隔离和识别。此外,还鉴定了三种未描述的环烯醚萜苷和四种已知的。所有分离株均采用光谱技术进行鉴定,并首次采用CD法测定了28-降油菜烷衍生的螺环三萜的绝对构型。此外,还应用碱
水解法和 HPLC 分析来确认环烯醚萜苷的组成部分。评估级分和分离物对宫颈癌 (Hela)、人早幼粒细胞白血病 (HL-60)、和乳腺癌 (MCF-7)
细胞系。其中,具有醛基的 phlomisu E 表现出最强的细胞毒作用,IC50 值小于 10 μM。