Glycosides from Erigeron breviscapus

A new glycoside, gamma-pyranone-3-O-beta-D-[6'-(4'-hydroxy-3',5'-dimethyoxybenzoyl)]-glucopyranoside (erigeside D, 2), together with nine known compounds, viz., erigeside I (1), erigeside A (3), erigeside B (4), erigeside II (5), scopolin (6), icariside B-2 (7), blumenol C glucoside (8), (+)-syringaresinol O-beta-D-glucopyranoside (9) and scutellarein-7-O-beta-D-glucuronide methyl ester (10), was isolated from Erigeron breviscapus (Vant.) Hand.-Mazz. Their structures were established on the basis of spectral evidence. According to the beta-glucopyranosyl moiety in 7, the absolute configuration of 7 was determined by X-ray crystallographic analysis. Compounds 7, 8 and 9 were isolated for the first time from this genus, an compound 6 was first obtained from this plant.

千层塔中的一个新黄酮苷(英文)

目的:研究千层塔(Huperzia serrata)化学成分。方法:采用柱层析方法分离纯化,根据理化性质和光谱数据鉴定化合物的结构。结果:分离鉴定了1个黄酮苷为5,5'-dihydroxy-2',4'–dimethoxy-flavone-7-O-β-D-(6"-O-Z-p-coumaroyl)-glu-copyranoside(1)。结论:化合物1为新化合物。

Chemical Constituents of Rheum tanguticum Maxim.ex Balf.

Aim To study the chemical constituents of the root and rhizome of Rheum tanguticum Maxim. ex Balf. Methods Chemical constituents were isolated and purified by many chromatographic methods, and their structures were elucidated by MS, NMR, and others. Results Twenty compounds were isolated and their structures were identified as β-sitosterol, chrysophanol, aloe-emodin, physcion, rhein, emodin, etc. Conclusion Among these compounds, 4-(4′-hydroxyphenyl)-2-butanone, 4-(4′-hydroxyphenyl)-2-butanone-4′-O-β-D-(2″-...

冰糖草化学成分的分离与鉴定

目的研究冰糖草(Scoparia dulcis L.)全草乙醇提取物的正丁醇萃取部位的化学成分。方法运用硅胶、Sephadex LH-20和半制备HPLC等各种方法进行分离纯化,根据理化性质和波谱数据等鉴定化合物结构。结果分离得到16个化合物,分别鉴定为(2S)-7-methoxy-2H-1,4-benzoxazin-3(4H)-one 2-O-β-glucopyranoside(1)、(2R)-7-methoxy-2H-1,4-benzoxazin-3(4H)-one 2-O-β-glucopyranoside(2)、对羟基苯甲酸甲酯(3)、对羟基苯甲醛(4)、2-唑啉酮(5)、对羟基苯乙酮(6)、薏苡素(7)、苯甲酸(8)、对羟基肉桂酸甲酯(9)、黑麦草内酯(10)、异黑麦草内酯(11)、橙酰胺乙酸酯(12)、apigenin 7-O-rutinoside(13)、hispidulin-7-O-rutinoside(14)、isoschaftoside(15)和schaftoside(16)。结论化合物1为新化合物,化合物13~16为首次从冰糖草中分离得到。

Isolation and structural elucidation of an unstable isoflavonoid glycoside malonate from Radix hedysari

Based on the stability results of Radix hedysari extract, an unstable compound was extracted using acidic methanol and purified by rapid chromatographic methods successfully from Radix hedysari for the first time guided by HPLC analysis. Its structure was identified as formononetin 7-O-β-D-（6＂-O-malonyl）-glucopyranoside by spectroscopic analyses.

光皮木瓜中酚性成分研究

目的研究光皮木瓜[Chaenomeles sinensis(Thouin)Koehne]化学成分,为药理活性筛选奠定基础。方法采用大孔吸附树脂Daion HP-20、Toyopearl HW-40、ODS中压制备和Sephadex LH-20柱色谱并结合半制备液相等传统的分离手段,对光皮木瓜的体积分数50%丙酮提取物进行了分离纯化,通过系统波谱解析,结合文献数据分析,鉴定分离得到的化合物结构。结果从光皮木瓜中分离得到20个酚类化合物,6-O-(E)-feruloyl-β(α)-glucopyranoside(1),2,4,6-三羟基苯乙酮-2-O-吡喃葡萄糖苷(2),(E)-4-羟基-肉桂醇-4-O-β-D-葡萄糖苷(3),3,4,5-trimethoxyphenyl-1-O-β-D-glucopyranoside(4),顺式松柏苷(5),syringin(6),4-(2,3-dihydroxypropyl)-2,6-dimethoxyphenyl-β-D-glucopyranoside(7),(7S,8S)-syringoylglycerol-9-O-β-D-glucopyranoside(8),L-threo-guaiacylglycerol-8-O-β-glucopyranoside(9),3,5-dimethoxy-4-O-β-D-glucopyranosylphenylpropane-7,9-diol(10),3-methoxy-4-hydroxyphenol 1-O-β-apiofuranosyl-(1→6)-O-β-D-glucopyranoside(11),3,4,5-trimethoxyphenol 1-O-β-D-apiofuranosyl-(1→6)-β-D-glucopyranoside(12),二氢丁香苷(13),3-羟基-5-丙基苯基-O-β-D-吡喃葡萄糖苷(14),ω-hydroxypropioguaiacone(15),dihydrosyringenin(16),3,4-二羟基苯甲酸(17),香草酸(18),1,3,5-三甲氧基苯(19)和对羟基苯丙酸(20)。结论化合物1~20均为首次从该植物中分离得到。

A Novel Flavonoid Glucoside from Anoectochilus roxburghii （Wall,） Lindl.

Eight compounds were isolated from the ethyl acetate- and n-butanol-soluble fractions of the ethanollc extract of the whole plant of Anoectochllus roxburghll（Wali.） Lindi. （Orchidaceee）. On the basis of spectroscopic methods, the structures of these compounds were elucidated as quercetin-7-O-β-D-[6＂-O-（trans-feruloyi）]- giucopyranosids （compound 1）, 8-C-p-HydroxybenzyiquerceUn （compound 2）, isorhamnetin-7-O-β-D- giucopyranoside （compound 3）, isorhamnetin-3-O-β-D-giucopyranoside （compound 4）, kaempferoi-3-O-β-D- giucopyranoside （compound 5）, kaempferoi-7-O-β-D-giucopyranoside （compound 6）, 5-hydroxy-3＇,4＇,7- trimethoxyfiavonoi-3-O-β-D-rutinoside （compound 7）, and isorhamnetin-3-O-β-D-rutinoside （compound 8）. Of the compounds isoisted, compound 1 was a new flavonoid giucoside and exhibited strong scavenging activity against the 1,1-diphenyi-2-picryihydrazyi free radical, whereas the ethanolic extract showed weak activity. Compounds 2-8 were obtained from this family for the first time.