The essential oil from the leaves of Philadelphus x purpureomaculatus Lemoine was obtained by hydrodistillation and analyzed by high-resolution gas-liquid chromatography - mass spectrometry (GLC-MS). The essential oil of P. x purpureomaculatus leaves was dominated by terpenoids containing hydroxyl and carbonyl groups. The major components of P. x purpureomaculatus essential oil were viridiflorol (44.4%), manool (31.2%), pentadecanal (5.4%), and borneol (4.9%). Antioxidant capacity and cytotoxicity of methanol extracts and essential oil of P. x purpureomaculatus were evaluated by using DPPH-, ABTS-, FRAP- and MTTassays. Extracts from P. x purpureomaculatus have shown weak antioxidant activity compare with positive control (caffeic acid). The highest cytotoxicity effect was observed with methanol leave extract on CCRF-CEM cells with IC50 value 38.5 μg/ml.

中文翻译：

---

Philadelphus x purpureomaculatus Lemoine 叶精油的化学成分和生物活性

来自 Philadelphus x purpureomaculatus Lemoine 叶子的精油通过水蒸馏获得，并通过高分辨率气液色谱 - 质谱 (GLC-MS) 进行分析。P. x purpureomaculatus 叶子的精油以含有羟基和羰基的萜类化合物为主。P. x purpureomaculatus 精油的主要成分是绿花醇（44.4%）、甘露醇（31.2%）、十五烷醛（5.4%）和冰片（4.9%）。使用 DPPH-、ABTS-、FRAP- 和 MTTassays 评估了 P. x purpureomaculatus 甲醇提取物和精油的抗氧化能力和细胞毒性。与阳性对照（咖啡酸）相比，P. x purpureomaculatus 的提取物显示出较弱的抗氧化活性。甲醇叶提取物对 CCRF-CEM 细胞的细胞毒性作用最高，IC50 值为 38。