The chemical structures of nine cucurbitane-type triterpenoids from the branches and leaves of Elaeocarpus sylvestris (Elaeocarpaceae), including undescribed 29-hydroxymogroside I E₂, epimogroside I E₂, epimogroside I E₁, 24-oxomogroside I E₁, and 11-O-acetylmogroside I E₁, were determined using mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy. The absolute configuration of 29-hydroxymogroside I E₂ was confirmed by performing an X-ray diffraction analysis. Cucurbitacin D and 11-O-acetylmogroside I E₁ showed cytotoxicity toward human leukemia HL-60, human lung adenocarcinoma A549, human hepatoma SMMC-7721, human breast cancer MCF-7, and human colon cancer SW480 cell lines. The presence of a 11-O-acetyl group might increase the cytotoxicity of this type of triterpenoids.

樟子松(Elaeocarpaceae)枝叶九种葫芦烷型三萜的化学结构，包括未描述的 29-羟基罗汉果苷 IE ₂ 、表罗汉果苷 IE ₂、表罗汉果苷 IE ₁、24-氧代罗汉果苷 IE ₁和 11 - O-乙酰罗汉果苷 IE_如图1所示，使用质谱(MS)和核磁共振(NMR)光谱测定。29-羟基罗汉果苷IE ₂的绝对构型通过进行X射线衍射分析来确认。葫芦素 D 和 11 - O-乙酰罗汉果苷 IE ₁显示对人白血病 HL-60、人肺腺癌 A549、人肝癌 SMMC-7721、人乳腺癌 MCF-7 和人结肠癌 SW480 细胞系的细胞毒性。11- O-乙酰基的存在可能会增加此类三萜类化合物的细胞毒性。