Bioactive Eudesmane sesquiterpenes from Artabotrys hongkongensis Hance

Abstract

A new naturally occurring trinoreudesmane sesquiterpene, artahongkongol A (1), together with seven known eudesmane sesquiterpenes (2?8), was isolated from the stems and leaves of Artabotrys hongkongensis Hance. Among them, 1 is a rare trinoreudesmane sesquiterpene containing 12 carbon atoms on the carbon skeleton. All known compounds (2?8) were isolated from the genus Artabotrys for the first time. The structure of 1 was elucidated by extensive spectroscopic methods and the known compounds were identified by comparisons with data reported in the literature. All isolated compounds were evaluated for their cytotoxicities against five human cancer cell lines: HL-60, SMMC-7721, A-549, MCF-7 and SW480 in vitro. Compounds 1?8 showed significant inhibitory effects against various human cancer cell lines with IC₅₀ values ranging from 0.57 to 15.68?μM.     

分光光度法测定蒙药材接骨木中盐酸小檗碱的含量

采用回流和超声波两种方法对蒙药材接骨木中盐酸小檗碱进行提取,并用分光光度法测定盐酸小檗碱的含量,检测波长426 nm.回归方程为：Y=0.00393＋1.28929X（mg/10 ml）r=0.99992;盐酸小檗碱浓度在0.099-0.796 mg/10 ml范围内与吸光度呈线性关系,平均回收率分别为：回流法96.19%;超声波法102.69%.实验结果表明,超声波提取法较回流提取法提取率高.分光光度法简便快速,适用于接骨木中盐酸小檗碱的含量测定.     

Two New Phloroglucinol Glycosides from Lysidice rhodostega Hance

Two new phloroglucinol glycosides, lysidiciside A (1) and lysidiciside B (2), were isolated from the roots of Lysidice rhodostega Hance. Their structures were determined as 1-[(3-methylbutyryl)phloroglucinol]-β-D- glucopyranoside (1), 1-[(3-methylbutyryl)phloro-glucinol]-β-D-glucopyranosyl-5-O-β-D-glucopyranoside (2) on the basis of chemical and spectral analysis.     

不同产地及不同生长期高良姜中总黄酮的测定

不同产地及不同生长期高良姜中总黄酮的测定＊罗辉张建和莫丽儿（广东医学院化学教研室湛江５２４０２３）关键词高良姜总黄酮柱层析－分光光度法中图分类号Ｏ６５７．３２高良姜系姜科植物高良姜ＡｌｐｉｎｉａｏｆｉｃｉｎａｒｕｍＨａｎｃｅ的根状茎，其药性温中散寒，...     

Insecticidal and α-glucosidase inhibitory activities of chemical constituents from Viburnum fordiae Hance

The ethanolic extract of the stems of Viburnum fordiae Hance showed insecticidal and α-glucosidase inhibitory activities and then was fractionated by bioactivity-guided fractionation to obtain a rare C₁₃-norisoprenoid (1), together with a new phenolic glycoside (2), and seven known compounds, alangionoside C (3), pisumionoside (4), koaburaside (5), 3,5-dimethoxy-benzyl alcohol 4-O-β-d-glucopyranoside (6), 3,4,5-trimethoxybenzyl-β-d-glucopyranoside (7), arbutin (8), and salidroside (9). The previously undescribed compounds were elucidated as (3R,9R)-3-hydroxy-7,8-didehydro-β-ionyl 9-O-α-d-arabinopyranosyl-(1→6)-β-d-glucopyranoside (1) and 2-(4-O-β-d-glucopyranosyl)syringylpropane-1,3-diol (2) by spectroscopic data (¹H and ¹³C NMR, HSQC, HMBC, ¹H-¹H COSY, HSQC-TOCSY, HRESIMS, IR and ORD) and chemical methods. Compound 1 showed potent insecticidal effect against Mythimna separata with LD₅₀ value of 140 μg g^?1. Compounds 2, 5, 6, 8 and 9 showed varying α-glucosidase inhibitory activity with IC₅₀ values ranging from 148.2 to 230.9 μM.     

Chemical Components of Anaphalis Sinica Hance

Twenty components (including a new flavanone) were isolated and identified from the whole plant of Anaphalis sinica Hance. Their structures were determined on the basis of spectral analysis and chemical transformation. These components are 6‐[(5‐methyl‐6‐ethyl‐4‐hydroxy‐pyrone‐3‐yl)‐methylene]glabranine ( 1 ), kaempferol ( 2 ), tiliroside ( 3 ), quercetin ( 4 ), quercetin‐3‐O‐β‐D‐glucoside ( 5 ), scutellarin ( 6 ), 5,7‐dihydroxy‐8‐methoxyflavone ( 7 ), 5,7‐dihydroxy‐4′‐methoxy‐flavone‐7‐O‐α‐L‐rhamnopyranosyl(1→6)‐β‐D‐glucopyranoside ( 8 ), helipyrone ( 9 ), 4′‐hydroxydehydrokawain ( 10 ), panamin ( 11 ), ursolic acid ( 12 ), pomolic acid ( 13 ), 3‐acetyloleanolic acid ( 14 ), a mixture of N‐(2‐hydroxy‐acyl)‐4‐hydroxy‐8(E)‐ene‐sphingenine ( 15 ), O‐methyl‐D‐inositol ( 16 ), a mixture of β‐sitosterol ( 17 ) and stigmasterol ( 18 ) and a mixture of daucosterol ( 19 ) and stigmasterol‐β‐D‐glucoside ( 20 ). Among them, 6‐[(5‐methyl‐6‐ethyl‐4‐hydroxy‐pyrone‐3‐yl)‐methylene]glabranine ( 1 ) is a new compound, and ¹³C NMR data of panamin ( 11 ) is reported for the first time.     

27-Nor-triterpenoid saponins from Adina rubella

Three new 27-nor-triterpenoid saponias named rubenorside A (1),rubenorside B(2) and rubenorside C (3) were isolated from the roots of Adina rubella.Their structures were characienzed as pyrocincholic acid 3β-O-α-L-rhamnopyranosyl(28→1 )-β-D-glucopyranosyl ester (1),pyrocinchohe acid 3β-O-β-D-glucopyranosyl(1→2)-β-D-fucopyranosyl(28→1)-β-D-glucopyranosyl(1→6)-β-D-glico-pyranosyl ester (2) and pyrocincholic acid 3β-O-β-D-glucopyranosyl(1→2)-β-D-glucopyranosyl(28→1)β-D-glucopyranosyl(1→6)-β-D-glucopyranosyl ester () by spectral methods,especially 2D NMR experiments.     

超临界CO_2萃取珊瑚姜挥发油抗部分植物病原菌活性研究

采用超临界CO_2萃取珊瑚姜挥发油,对其成分进行GC/MS分析,利用生长速率法测定珊瑚姜挥发油对水稻稻瘟、水稻纹枯及小麦赤霉病菌的抗菌活性,结果显示,珊瑚姜挥发油检出29个化学成分,含量最高的化合物为萜品烯-4-醇;珊瑚姜挥发油对小麦赤霉病菌的EC_(50)为247.80 mg/L(Y=3.7940X-4.0832,r= 0.970 5),水稻稻瘟病菌的EC_(50)为99.64 mg/L(Y=1.1651X+2.6716,r=0.9090),水稻纹枯病菌的EC_(50)为106.16 mg/L(Y=1.2878X+2.3909,r=0.9964),实验表明,珊瑚姜挥发油对供试菌株具有较强的抑制作用,显示了较好的应用开发前景。     

枫香半同胞子代遗传变异研究

对幼林期枫香首批优树的半同胞自由授粉家系子代进行生长分析。结果表明,在参试家系间存在着丰富的遗传变异,树高、年高、地径、冠幅和分枝数的家系遗传力分别为：14．53％～47．58％,13．36％～35．43％,6．40％～37．04％,14．25％～35．30％,6．19％～18．78％;每个性状的单株遗传力则分别为21．26％～52．91％,16．97％～28．63％,13．23％～22．22％,18．76％～30．69％,9．03％～15．58％;各性状的相关程度较高,树高、年高、地径及冠幅和分枝数等性状的加性遗传变异系数分别为4．979％～9．667％,5．913％～12．783％,5．164％～6．731％,6．240％～10．567％,4．952％～11．780％;估算的中选优良家系树高和地径的遗传增益分别为6．52％～19．OO％和3．82％～24．32％。     

水杨梅化学成分研究

采用柱色谱技术,对水杨梅的化学成分进行分离,从水杨梅乙醇提取物的乙酸乙酯萃取部位分离得到3个化合物,从正丁醇萃取部位分离得到4个化合物;根据光谱分析和文献对照的方法鉴定它们的结构分别为:异香草酸(1),七叶内酯(2),咖啡酸(3),5-hydroxy-2-methylchromone-7-O-β-D-xylopyranosyl(1→6)-β-D-glucopyranoside(4),东莨菪素(5),7-O-β-D-glucosyl-noreugenin(6),东莨菪苷(7).化合物1、2、3和7为首次从该植物中分离得到.