佩特曲霉菌中1个新的色原酮类化合物△*

目的 研究盐碱地来源的佩特曲霉菌在静置发酵条件下的次级代谢产物。方法 用正反相硅胶柱、Sephadex LH-20、高效液相等色谱技术对目标菌株的次生代谢产物进行分离纯化,经核磁共振谱、质谱、单晶X衍射等光谱方法和理化性质确定化合物的结构。结果 从佩特曲霉菌的静置发酵物中分离得到6个单体化合物,分别鉴定为：5-甲基-2-乙酰基-7-羟基色原酮 (1),2,5-二甲基-7-羟基色原酮 (2),avellanine A (3),avellanine B (4),(E)-N-[2-(4-羟基苯基)]乙烯基甲酰胺 (5),(Z)-N-[2-(4-羟基苯基)]乙烯基甲酰胺 (6)。结论 化合物1为新化合物,化合物2-6均为首次从佩特曲霉菌中获得。化合物1-6均没有明显的抗肿瘤活性。     

草酸青霉菌HSY-P-17次级代谢产物的分离与鉴定

目的研究草酸青霉菌(Penicillium oxalicum)HSY-P-17的次级代谢产物,以期得到有抗肿瘤活性的先导化合物。方法采用硅胶柱色谱、Sephadex LH-20凝胶柱色谱、开放ODS柱色谱及HPLC等方法进行分离纯化,通过理化性质和波谱手段分析确定化合物的化学结构。结果从草酸青霉菌HSY-P-17的乙酸乙酯萃取物中分离得到8个化合物,分别鉴定为:3-羟基异斯科勒酮(3-hydroxyisosclerone,1)、4-羟基-小柱孢酮(4-hydroxyscytalone,2)、2-乙酰基-3,5-二羟基苯乙酸甲酯(methyl 2-acetyl-3,5-dihydroxyphenylacetate,3)、大黄酚(chrysophanol,4)、7-羟基-2-(2-羟基丙基)-5-甲基色原酮[7-hydroxy-2-(2-hydroxypropyl)-5-methylchromone,5]、2-(4-羟基苯基)喹唑啉-4(3H)-酮[2-(4-hydroxybenzyl)quinazolin-4(3H)-one,6]、环(脯-缬)二肽[cyclo-(Pro-Val),7]和环(脯-甘)二肽[cyclo-(Pro-Gly),8]。结论化合物1⁸均为首次从草酸青霉菌HSY-P-17次级代谢产物中分离得到。     

大钟花酮类化学成分研究

目的研究藏药大钟花Megacodon stylophorus(C.B.Clarke)H.Smith全草乙醇提取物的化学成分。方法采用硅胶、MCI、葡聚糖凝胶等多种色谱技术对大钟花乙醇提取物进行分离纯化,根据理化性质和波谱学技术鉴定化合物结构。结果从大钟花乙醇提取物中分离得到了9个酮类化合物,分别鉴定为:1,5,8-三羟基-3-甲氧基酮(1),1,7-二羟基-3,8-二甲氧基酮(2),1,3,7,8-四羟基酮(3),1,3,8-三羟基-7-甲氧基酮(4),1,3,5,8-四羟基酮(5),1,8-二羟基-3-甲氧基酮(6),1,8-二羟基-3,5-二甲氧基酮(7),当药醇苷(8)和8-O-β-D-吡喃葡萄糖-1,3,5-三羟基酮(9)。结论 9个酮类化合物均为首次从大钟花属植物中分离获得。     

大叶藤黄中三个新酮类成分

为了研究大叶藤黄树皮中酮类成分，运用正相和反相硅胶柱色谱法对大叶藤黄树皮乙酸乙酯萃取物进行分离纯化，并用波谱技术鉴定化合物结构。共分离得到3个新酮类化合物，其结构分别鉴定为1,2,5-三羟基-6-甲氧基酮(1)，1,4,6-三羟基-5-甲氧基酮(2)，1,2,7-三羟基-4-(1,1-二甲基烯丙基)酮(3)。     

掌叶大黄化学成分的分离与鉴定

目的研究掌叶大黄(Rheum palmatum L.)的化学成分。方法采用反复柱硅胶色谱、制备薄层色谱、凝胶柱色谱(Sephadex LH-20)、反相中低压柱色谱、制备高效液相色谱(PRE-HPLC)等手段进行分离纯化,根据理化性质及光谱数据确定化合物的结构。结果从掌叶大黄体积分数95%乙醇提取物的乙酸乙酯萃取物中分离得到6个化合物,分别鉴定为:2-乙酰基-3,5-二羟基苯乙酸甲酯(methyl 2-acetyl-3,5-dihydroxyphenylacetate,1)、北美圣草素(eriodictyol,2)、二氢山萘酚(dihydrokaempferol,3)、2-甲基-5-羧甲基-7-羟基色原酮(2-methyl-5-carboxymethyl-7-hydroxychromone,4)、2-甲基-5-甲氧羰甲基-7-羟基二氢色原酮(2-methyl-5-methoxycarbonylmethyl-7-hydroxychromanone,5)和2-甲基-5-甲氧羰甲基-7-羟基色原酮(2-methyl-5-methoxycarbonylmethyl-7-hydroxychromone,6)。结论化合物1³为首次从大黄属植物中分离得到,化合物5为一新天然产物,化合物6为一新化合物。     

Limonia crenulata的新成分及其抗炎活性

芸香科柑果子属植物(Limoniacrenulata)为一印度传统药物,但尚未进行系统的化学研究。作者对其进行了化学和光谱分析,得到两个新化合物,经结构测定为8-羟基-5-甲氧基-2-甲基蒽醌-3-O-β-D-吡喃葡糖甙(8-hydroxy-6-methoxy-2-methyl anthraquinone-3-O-β-D-glucopyranoside)(Ⅰ)和繖形酮-7-O-α-L-     

大叶藤黄中三个新《口山》酮类成分

为了研究大叶藤黄树皮中<口山>酮类成分,运用正相和反相硅胶柱色谱法对大叶藤黄树皮乙酸乙酯萃取物进行分离纯化,并用波谱技术鉴定化合物结构.共分离得到3个新<口山>酮类化合物,其结构分别鉴定为1,2,5-三羟基-6-甲氧基<口山>酮(1),1,4,6-三羟基-5-甲氧基<口山>酮(2),1,2,7-三羟基-4-(1,1-二甲基烯丙基)<口山>酮(3).     

红松松针中木脂素类成分的分离与鉴定

目的研究红松松针中的木脂素类成分,为松属植物的化学分类学研究提供依据。方法采用反复硅胶、聚酰胺、ODS、Sephadex LH-20柱色谱等方法进行分离纯化,根据理化性质和波谱分析对分离得到的化合物进行结构鉴定。结果从红松松针中分离得到8个化合物,分别鉴定为(+)-异落叶松脂素-9-O-β-D-吡喃木糖苷((+)-isolariciresinol-9-O-β-D-xylopyranoside,1)、(+)-异落叶松脂素-9-O-β-D-吡喃葡萄糖苷((+)-isolariciresinol-9-O-β-D-glucopyranoside,2)、7S,8R-苏式-3′,4,9′-三羟基-3-甲氧基-7,8-二氢苯并呋喃-1′-丙醇基新木脂素-9-O-α-L-吡喃鼠李糖苷(7S,8R-threo-3′,4,9′-trihydroxy-3-methoxy-4′,7-epoxy-neolignan-9-O-α-L-rhamnopyranoside,3)、7S,8R-苏式-3′,9,9′-三羟基-3-甲氧基-7,8-二氢苯并呋喃-1′-丙醇基新木脂素-4-O-α-L-吡喃鼠李糖苷(7S,8R-threo-3′,9,9′-trihydroxy-3-methoxy-4′,7-epoxy-neolignan-4-O-α-L-rhamnopyranoside,4)、7R,8S-赤式-4,7,9-三羟基-3,3′-二甲氧基-8-O-4′-新木脂素-9′-O-α-L-吡喃鼠李糖苷(7R,8S-erythro-4,7,9-trihydrox-y-3,3′-dimethoxy-8-O-4′-neolignan-9′-O-α-L-rhamnopyranoside,5)、7S,8S-苏式-4,7,9-三羟基-3,3′-二甲氧基-8-O-4′-新木脂素-9′-O-α-L-吡喃鼠李糖苷(7S,8S-threo-4,7,9-trihydroxy-3,3′-dimethoxy-8-O-4′-neolignan-9′-O-α-L-rhamnopyranoside,6)、7S,8S-苏式-3′,4,7,9-四羟基-3-甲氧基-8-O-4′-新木脂素-9′-O-α-L-吡喃鼠李糖苷(7S,8S-threo-3′,4,7,9-tetrahydroxy-3-methoxy-8-O-4′-neolignan-9′-O-α-L-rhamnopyranoside,7)、7R,8S-赤式-3′,4,9,9′-四羟基-3-甲氧基-8-O-4′-新木脂素-7-O-β-D-吡喃葡萄糖苷(7R,8S-erythro-3′,4,9,9′-tetrahydroxy-3-methoxy-8-O-4′-neolignan-7-O-β-D-glucopyr-anoside,8)。结论化合物1~8均为首次从红松中分离得到。     

北柴胡地上部分化学成分的分离与鉴定

目的对中药北柴胡地上部分的化学成分进行分离和鉴定。方法北柴胡地上部分的水提物(100℃,水27 L/次,3 h/次,3次)用硅胶吸附柱色谱和凝胶柱色谱的方法分离得到2个黄酮化合物,一个甾醇和一个色原酮类化合物共4个化合物。结果利用理化性质分析和波谱学手段(UV、NMR),将这4个化合物分别鉴定为β-谷甾醇(-βsitosterol)(1),山柰酚-3-O--αL-阿拉伯糖苷(kaempferol-3-O--αL-arabinofuranoside)(2),山柰酚-3,7-二-O-α-L-鼠李糖苷(kaempferol-3,7-di-O--αL-rhamnopyranoside)(3),7-羟基-2,5-二甲基-色原酮(7-hydroxy-2,5-dimethyl-chromnone)(4)。结论化合物(4)、(2)为柴胡属首次分离得到。     

水团花根茎醋酸乙酯部位的化学成分研究

目的 研究水团花Adina pilulifera根茎醋酸乙酯提取部位的化学成分.方法 溶剂法进行提取和萃取,采用硅胶柱色谱进行分离,利用光谱数据结合理化性质鉴定其结构.结果 分离得到5个化合物,分别鉴定为去甲丁香色原酮(1)、7-O-β-D-葡萄糖基-去甲丁香色原酮(2)、鸡纳酸(3)、2-羟基-3-甲基葸醌(4)和3,8-二羟基-1-甲氧基-2-甲氧基亚甲基-9,10-葸醌(5).结论 化合物4、5为首次从该植物中分离得到.     

A New Naphthoquinone from Bombax Malabaricum

A new naphthoquinone 1 together with 7-hydroxycadalene (2) and 8-formyl-7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthoquinone (3) were isolated from the heartwood of Bombax malabaricum. The new naphthoquinone was characterized as 7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthoquinone (1) based on spectral and chemical studies.     

A new naphthoquinone from Ceiba pentandra

A new naphthoquinone, 2,7-dihydroxy-8-formyl-5-isopropyl-3-methyl-1,4-naphthoquinone (1) together with a known naphthoquinone, 8-formyl-7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthoquinone (2), has been isolated from the heartwood of Ceiba pentandra. The structures of 1 and 2 have been elucidated by extensive 1D and 2D NMR experiments.     

A New Naphthoquinone from Bombax Malabaricum

Abstract

A new naphthoquinone 1 together with 7-hydroxycadalene (2) and 8-formyl-7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthoquinone (3) were isolated from the heartwood of Bombax malabaricum. The new naphthoquinone was characterized as 7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthoquinone (1) based on spectral and chemical studies.     

Anthraquinones from Gladiolus gandavensis

Five new anthraquinones have been obtained from the ethanolic extracts of the subterranean corms of Gladiolus gandavensis Van Houtt. Their structures were elucidated as 3,8-dihydroxy-6-methoxy-1-methyl-anthraquinone (gandavensin D, 1), methyl 3,8-dihydroxy-6,7-methylenedioxy-1-methyl-anthraquinone- 2-carboxylate (gandavensin E, 2), 2,3,8-trihydroxy-6-methoxy-1-methoxymethyl-anthraquinone (gandavensin F, 3), 8-hydroxy-3,6-dimethoxy-1-methyl-anthraquinone-2-carboxylic acid (gandavensin G, 4) and 1,7-dihydroxy-3,6-dimethoxy-anthraquinone (gandavensin H, 5) on the basis of spectral data. The known compounds isolated for the first time from this plant have been determined to be methyl 3,6,8-trihydroxy-7-methoxy-1-methyl-anthraquinone-2-carboxylate (6), methyl 3,6,8-trihydroxy-1-methyl-anthraquinone-2-carboxylate (7), 3,8-dihydroxy-6-methoxy-1-methyl-anthraquinone-2-carboxylic acid (8), 3,6,8-trihydroxy-1-methyl-anthraquinone-2-carboxylic acid (9), 6,8-dihydroxy-3-methoxy-1-methyl-anthraquinone-2-carboxylic acid (10), methyl 3,8-dihydroxy-6-methoxy-1-methyl-anthraquinone-2-carboxylate (11) and methyl 3,7,8-trihydroxy-1-methyl-anthraquinone-2-carboxylate (12).     

国产沉香化学成分研究 Ⅳ.2-(2-苯乙基)色酮类化合物的分离与鉴定

自国产沉香(Lignum Aquilariae sinensis)[属瑞香科(Thymeleaceae)植物]的乙醇提取物的乙醚溶解部分中分离得到六个2-(2-苯乙基)色酮类化合物。经光谱(UV,IR,¹HNMR ¹³CNMR和MS)分析及化学合成,确定其中一个为新化合物,即6-羟基-2-[2-(4-甲氧基苯)乙基]色酮(Ⅴ)。其余五个为已知化合物,即2-(2-苯乙基)色酮,6-氧基-2-(2-苯乙基)色酮,6,7-二甲氧基-2-(2-苯乙基)色酮,6-甲氧基-2-[2-(3′-甲氧基苯)乙基]色酮和6-羟基-2-(2-苯乙基)色酮,这些化合物均是首次从该植物中分离得到。     

Phytochemical investigation of Cassia multijuga seeds

From the seeds of CASSIA MULTIJUGA 1,3,8-trihydroxy-2-methyl anthraquinone, 1:3-dihydroxy 6,8-dimethoxy-2-methyl anthraquinone and two glycosides 3-hydroxy-6,8-dimethoxy-2-methyl anthraquinone-1-O-beta- D(+) glucopyranoside and 3-hydroxy 6,8-dimethoxy-2-methyl anthraquinone 1-O-rhamnopyranosyl (1 --> 6) glucopyranoside (rutinoside) have been isolated and their structures elucidated. The last three compounds are new and have not been isolated previously from any plant source.     

New anthraquinone dimer from the root bark of Cassia artemisioides (Gaudich. Ex. DC) Randell

The phytochemical investigation of the root bark of Cassia artemisioides (Gaudich. Ex. DC) Randell resulted in the isolation of one new anthraquinone 1,1′-dihydroxy-3,3′-dimethyl-8,8′-dimethoxy-6,6′-O-bianthraquinone (1) along with four known anthraquinones 1,6-dihydroxy-8-methoxy-3-methylanthraquinone (2), 1-hydroxy-8-methoxy-3-methylanthraquinone (3), 1,8-dihydroxy-6-methoxy-3-methylanthraquinone (4), and 1,6,8-trihydroxy-3-methylanthraquinone (5). The structures of the compounds were elucidated using spectroscopic techniques including 1D and 2D NMR. The compounds were evaluated for antioxidant activity. 1,6,8-Trihydroxy-3-methyl anthraquinone (5) showed good activity among the tested compounds.     

Xanthone glycosides from Swertia franchetiana

A new xanthone glycoside (1) has been isolated from Swertia franchetiana together with five known xanthone glycosides. Their structures were elucidated as 7-O-[beta-D-xylopyranosyl-(1-->2)-beta-D-xylopyranosyl]-1,7,8-trihydroxy-3-methoxyxanthone (1), 7-O-[alpha-L-rhamnopyranosyl-(1-->2)-beta-D-xylopyranosyl]-1,7,8-trihydroxy-3-methoxyxanthone (2), 8-O-beta-D-glucopyranosyl-1,3,5,8-tetrahydroxyxanthone (3), 1-O-beta-D-glucopyranosyl-1-hydroxy-3,7,8-trimethoxyxanthone (4), 1-O-[beta-D-xylopyranosyl-(1-->6)-beta-D-glucopyranosyl]-1-hydroxy-2,3,5-trimethoxyxanthone (5) and 1-O-[beta-D-xylopyranosyl-(1-->6)-beta-D-glucopyranosyl]-1-hydroxy-3,5-dimethoxyxanthone (6) on the basis of spectroscopic evidence.     

New anthraquinone dimer from the root bark of Cassia artemisioides (Gaudich. Ex. DC) Randell

The phytochemical investigation of the root bark of Cassia artemisioides (Gaudich. Ex. DC) Randell resulted in the isolation of one new anthraquinone 1,1'-dihydroxy-3,3'-dimethyl-8,8'-dimethoxy-6,6'-O-bianthraquinone (1) along with four known anthraquinones 1,6-dihydroxy-8-methoxy-3-methylanthraquinone (2), 1-hydroxy-8-methoxy-3-methylanthraquinone (3), 1,8-dihydroxy-6-methoxy-3-methylanthraquinone (4), and 1,6,8-trihydroxy-3-methylanthraquinone (5). The structures of the compounds were elucidated using spectroscopic techniques including 1D and 2D NMR. The compounds were evaluated for antioxidant activity. 1,6,8-Trihydroxy-3-methyl anthraquinone (5) showed good activity among the tested compounds.