The chemical study of the stems extract of Psychotria arborea Hiern led to the isolation of thirteen compounds, including four anthraquinones: 2-methylanthracene-9,10-dione (1), 2-methoxyanthracene-9,10-dione (2), 2-hydroxy-3-methylanthracene-9,10-dione (3) and 3-hydroxy-1-methoxy-2-methylanthracene-9,10-dione (4); two diterpenes: ent-kaur-16-en-19-oic acid (5) and 15-acetoxy-ent-kaur-16-en-19-oic acid (6); two triterpenes, β-amyrin (8) and oleanolic acid (9), one flavonoid: Quercetin (7), three sterols: A mixture of stigmasterol (10) and β-sitosterol (11) and β-sitosterol-3-O-β-D-glucopyranoside (12) and one fatty acid (13). The structures of these compounds were elucidated based on NMR and HR-ESIMS analysis, further supported by comparison with previously reported spectral data. Compounds 1–4 and compounds 10–12 were tested for their antibacterial activity against three bacteria strains Escherichia coli, Staphylococcus aureus and Salmonella enterica. All these tested compounds were found to be inactive. Furthermore, the chemotaxonomic significance of the obtained compounds was discussed in detail.

对Psychotria arborea Hiern茎提取物的化学研究导致分离出13种化合物，包括四种蒽醌：2-甲基蒽-9,10-二酮（1），2-甲氧基蒽-9,10-二酮（2），2 -羟基-3-甲基蒽-9,10-二酮（3）和3-羟基-1-甲氧基-2-甲基蒽-9,10-二酮（4）；两个二萜：ent-kaur-16-en-19-oic酸（5）和15-乙酰氧基-ent-kaur-16-en-19-oic酸（6）；2个三萜，β-糊精（8）和齐墩果酸（9），一种类黄酮：槲皮素（7），三种甾醇：豆甾醇的混合物（10）和β谷甾醇（11）和β谷甾醇-3- ö -β- d吡喃葡萄糖苷（12）和一种脂肪酸（13）。根据NMR和HR-ESIMS分析阐明了这些化合物的结构，并与先前报道的光谱数据进行了比较，进一步证实了这些化合物的结构。化合物1 - 4和化合物10 - 12对它们的抗菌活性进行了测试针对三种细菌菌株大肠杆菌，金黄色葡萄球菌和肠道沙门氏菌。发现所有这些测试的化合物均无活性。此外，详细讨论了所得化合物的化学分类学意义。