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作 者:周凌云[1,2] 余小红[2] 耿圆圆[2] 华燕[2]
机构地区:[1]皖南医学院药学院,安徽芜湖241002 [2]西南林业大学林学院,云南昆明650224
出 处:《林产化学与工业》2017年第2期121-128,共8页Chemistry and Industry of Forest Products
基 金:国家自然科学基金资助项目(31260083);皖南医学院校重点科研项目培育基金(WK2016Z06)
摘 要:以小远志干燥根茎为原料,采用乙醇提取、硅胶柱层析、Sephadex LH-20、MCI-gel和半制备型HPLC分离等方法对小远志中酮类化学成分进行研究。从中分离得到18个酮类化合物,根据理化性质及ESI-MS、~1H NMR、^(13)C NMR等波谱数据,分别鉴定为:1,7-二羟基酮(1),3,6-二羟基-1,2,7,8-四甲氧基酮(2),1,7-二羟基-5,6-二甲氧基酮(3),1,5-二羟基-6,7-二甲氧基酮(4),6-羟基-1,7-二甲氧基酮(5),7-羟基-1-甲氧基酮(6),3,8-二羟基-1,2,4-三甲氧基酮(7),6,8-二羟基-1,2,3-三甲氧基酮(8),1,3,6-三羟基-2,7,8-三甲氧基酮(9),3-羟基-1,2,8-三甲氧基酮(10),1,3,7-三羟基酮(11),1,6-二羟基-2,3-二氧亚甲基-7,8-二甲氧基酮(12),1,7-二羟基-2,3-二甲氧基酮(13),1,6-二羟基-5,7-二甲氧基酮(14),3,7-二羟基-1,2-二甲氧基酮(15),3,7-二羟基-1,2,8-三甲氧基酮(16),1,2,3,7-四甲氧基酮(17),1,6-二羟基-3,5,7,8-四甲氧基酮(18),除化合物13外,其它化合物均为首次从该植物中分离得到。对其中分离所得量较多的化合物1~7进行了抗氧化及抗菌实验,发现化合物4和1有较好的抗氧化活性,对ABTS·的IC50值分别为12和13 mg/L;化合物3对金黄色葡萄球菌有一定的抑制作用,MIC值为217μmol/L。Eighteen compounds were isolated by ethanol extraction, silica gel column chromatography, Sephadex LH-20 column chromatography, MCI-gel column chromatography and semi-preparative HPLC from the dried roots of Polygala sibirica L. var. megalopha Fr. Their structures were identified as 1,7-dihydroxy xanthone (1) , 3,6-dihydroxy-1,2,7,8-tetramethoxy xanthone (2), 1,7-dihydroxy-5,6- dimethoxy xanthone ( 3 ), 1,5-dihydroxy-6,7-dimethoxy xanthone ( 4 ), 6-hydroxy-1,7-dimethoxy xanthone (5), 7-hydroxy-l-methoxy xanthone ( 6), 3,8-dihydroxy- 1,2,4-trimethoxy xanthone (7), 6,8-dihydroxy-1,2,3- trimethoxy xanthone ( 8 ), 1,3,6-trihydroxy-2,7,8-trimethoxy- xanthone ( 9 ), 3-hydroxy-1,2,8-trimethoxy xanthone ( 10 ), 1,3, 7-trihydroxy xanthone ( 11 ), 1,6-dihydroxy-2,3-methylene-dioxy-7,8-dimethoxy xanthone ( 12 ), 1,7-dihydroxy-2,3-dimethoxy xanthone (13), 1,6-dihydroxy-5,7-dimethoxy xanthone ( 14 ), 3,7-dihydroxy-1,2-dimethoxy xanthone ( 15 ), 3,7- dihydroxy- 1,2,8-trimethoxy xanthone ( 16 ), 1,2,3,7-tetramethoxy xanthone ( 17 ), 1,6-dihydroxy-3,5,7,8-tetramethoxy xanthone ( 18 ) by ESI-MS, 1H NMR, 13C NMR. All compounds except 13 were isolated from this plant for the first time. The antioxidant and antimicrobial activities of compound 1-7 were studied. And the results showed that the compound 4( IC50 = 12 mg/L)and compound 1 ( IC50 = 13 mg/L) showed good ABTS scavenging activity and compound 3 ( MIC = 217 μmol/L) had certain inhibitory activity against Staphylococcus aureus.
关 键 词:小远志 [口山]酮类化学成分 抗氧化 抗菌
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