作者:Nawal Al-Musayeib、Gamal Mohamed、Sabrin Ibrahim、Samir Ross
DOI:10.3390/molecules19032819
日期:——
Phytochemical investigation of the methanolic extract of Tagetes minuta L. (Asteraceae) leaves resulted in the isolation and identification of two new compounds: 5-methyl-2,2',5',2'',5'',2''',5''',2''''-quinquethiophene (1) and quercetagetin-6-O-(6-O-caffeoyl-β-D-glucopyranoside) (9), in addition to seven known compounds: quercetin-3,6-dimethyl ether (2), quercetin-3-methyl ether (3), quercetin (4), axillarin-7-O-β-D-glucopyranoside (5), quercetagetin-3,7-dimethoxy-6-O-β-D-glucopyranoside (6), quercetagetin-7-methoxy-6-O-β-D-glucopyranoside (7), and quercetagetin-6-O-β-D-glucopyranoside (8). The compounds were identified by UV, IR, 1D, 2D NMR, and HRESIMS spectral data. They showed significant antioxidant activity, comparable with that of propyl gallate. Compounds 8 and 3 showed weak to moderate antileishmanial and antimalarial activities, with IC50 values of 31.0 μg/mL and 4.37 μg/mL, respectively.
通过对万寿菊(菊科)叶甲醇提取物的植物化学研究,分离并鉴定出两种新化合物: 5-methyl-2,2',5',2'',5'',2'',5'',2''''-quinethiophene (1) 和 quercetagetin-6-O-(6-O-caffeoyl-β-D-glucopyranoside) (9),此外还有 7 种已知化合物:槲皮素-3,6-二甲醚 (2)、槲皮素-3-甲醚 (3)、槲皮素 (4)、腋花素-7-O-β-D-吡喃葡萄糖苷 (5)、槲皮素-3、7-二甲氧基-6-O-β-D-吡喃葡萄糖苷(6)、槲皮素-7-甲氧基-6-O-β-D-吡喃葡萄糖苷(7)和槲皮素-6-O-β-D-吡喃葡萄糖苷(8)。通过紫外光谱、红外光谱、1D、2D NMR 和 HRESIMS 光谱数据对这些化合物进行了鉴定。它们显示出明显的抗氧化活性,与没食子酸丙酯相当。化合物 8 和 3 显示出弱到中等的抗利什曼病和抗疟活性,IC50 值分别为 31.0 μg/mL 和 4.37 μg/mL。