目的 研究蒲桃（原变种）Syzygium jambos var. jambos茎的化学成分。方法 利用硅胶、葡聚糖凝胶、氧化铝和制备液相等各种色谱技术进行分离和纯化，根据波谱数据分析鉴定化合物结构；利用MTT法评价分离化合物对人肝癌细胞Huh-7细胞毒作用。结果 从蒲桃茎醋酸乙酯和甲醇提取物中分离得到12个化合物，分别鉴定为麦珠子酸（1）、urolithin A（2）、邻苯二甲酸二正丁酯（3）、桦木酸（4）、熊果酸（5）、1-(4-methoxyphenyl)-1, 2-propanediol（6）、2, 6-dimethoxy-1, 4-benzoquinone（7）、邻苯二甲酸二异丁酯（8）、β-谷甾醇（9）、3-乙酰-熊果酸（10）、积雪草酸（11）和阿江榄仁酸（12）。细胞活性测试结果表明在50 μmol/L浓度时化合物1、7、10、11+12混合物对Huh-7细胞均未表现出显著的细胞毒作用。结论 除化合物4，其他11个化合物均为首次从植物分离获得，所测试化合物均无明显细胞毒活性。

Objective To study the chemical constituents from the stems of Syzygium jambos var. jambos. Methods The phyotchemicals were isolated by using various chromatographic techniques such as silica gel, Sephadex LH-20, alumina column chromatography, and preparative HPLC process. The structures were elucidated on the basis of spectral data analysis. Their cytotoxicity against human liver cancer cells Huh-7 was conducted using MTT assay. Results Twelve compounds were isolated from the EtOAc and MeOH extracts in the stems of S. jambos and identified as alphitolic acid (1), urolithin A (2), dibutyl phthalate (3), betulinic acid (4), ursolic acid (5), 1-(4-methoxyphenyl)-1, 2-propanediol (6), 2, 6-dimethoxy-1, 4-benzoquinone (7), diisobutyl phthalate (8), β-sitosterol (9), 3-acetyl-ursolic acid (10), asiatic acid (11), and arjunolic acid (12), respectively. All tested compounds 1, 7, 10, and 11 + 12 mixture did not show the cytotoxic activities towards human tumor cells Huh-7 in the test range up to 50 μmol/L. Conclusion Except compound 4, the other 11 compounds are obtained from this plant for the first time. All tested compounds exhibit no significant cytotoxic activity against Huh-7 cells.