Du Shijie, Wang Mingan, Zhu Wen, Qin Zhaohai
Department of Applied Chemistry, China Agricultural University, Beijing 100094, China.
Nat Prod Res. 2009;23(14):1316-21. doi: 10.1080/14786410902726183.
A new lactone was isolated from the leaves of Xylocarpus granatum, along with three known compounds: triacontanol, beta-sitosterol and kaempferol-3-O-beta-D-glucoside. Its structure was elucidated as 3-(1-hydroxyethyl)-4,4-dimethyl-4-butyrolactone (1) by infrared, (1)H and (13)C NMR and ESI-MS data. At a concentration of 20 microg mL(-1), the new lactone gave a 67.4% inhibition rate against wheat powdery mildew.
从木果楝的叶子中分离出一种新的内酯，以及三种已知化合物：三十烷醇、β-谷甾醇和山奈酚-3-O-β-D-葡萄糖苷。通过红外光谱、¹H和¹³C核磁共振以及电喷雾电离质谱数据，将其结构鉴定为3-(1-羟乙基)-4,4-二甲基-4-丁内酯(1)。在浓度为20微克/毫升时，这种新内酯对小麦白粉病的抑制率为67.4%。
