直距翠雀花中的降二萜生物碱

从直距翟雀花（Ｄｅｌｈｉｎｉｕｍ ｏｒｔｈｏｃｅｎｔｒｕｎ Ｆｒａｎｃｈ．）全草的甲醇提取物中分离得到了３个降二萜生物碱,通过ＮＭＲ,ＭＳ等波谱分析将其结构鉴定为７,１０－二羟基８,１、４,１６三甲氧基１９,２０－二去氢乌头烷（７β,８β,１４α,１６β）（１）,２０－乙基－２,３－二去氢－６,１０二羟基－７,８－二氧亚甲菜－１,１４,１６－三甲氧基乌头烷（１α,６β,１４α,１６β）（２）和翼北     

长序三宝木中的降二萜成分研究（英文）北大核心CSCD

从长序三宝木(Trigonostemon howii)茎的化学成分研究中发现4个降二萜化合物,其中新化合物trigohowilone A(1)经波谱数据包括核磁、质谱、比旋光等鉴定为trigoxyphin P的对映异构体。已知化合物结构确定为trigoxyphin Q(2),trigohowilol H(修订后的俗名)(3)和9-O-demethyltrigonostemone(4)。所有化合物均为首次从该植物中分离得到。     

毛姜花油细胞原位拉曼光谱研究

为避免复杂的样品的制备及提取过程,最大限度避免精油活性成分变化,常温下,用拉曼光谱原位分析毛姜花油细胞中精油。样品切片后置于共聚焦显微拉曼光谱仪下,用10倍物镜可观察到油细胞。油细胞精油的拉曼光谱与1,8-桉油精拉曼光谱非常相似。以毛姜花油细胞/1,8-桉油精的拉曼峰为序,较强峰出现在2928/2 921、647/652 cm~(-1),次强峰出现在540/545、808/813、915/920、926/930、1 012/1 016、1 075/1 080、1 270/1273、1 427/1 432 cm~(-1)。在油细胞中出现的强峰、次强峰与1,8-桉油精的拉曼峰一致,说明毛姜花油细胞中油的主要成分为1,8-桉油精。毛姜花油细胞的25条拉曼峰都与1,8-桉油精的拉曼峰有很好的对应关系。     

细叶草乌的二萜生物碱成分研究

对细叶草乌(Aconitum macrorhynchum)中的二萜生物碱进行研究.利用反复硅胶柱层析、重结晶等分离方法从中分离得到了5个二萜生物碱,用有机波谱学和理化常数测定鉴定了其结构,分别是:查斯曼宁(chas-manine,1)、塔拉萨敏(talatisamine,2)、滇乌碱( yunaconitine,3)、印乌碱(indaeonoitine,4)、粗茎乌碱甲(crassi-cauline A,5)、同时还得到β-谷甾醇(β-sitosterol,6)和β-胡萝卜苷(β-daueosterol,7).以上化合物均为首次从该植物中分离得到.     

池杉叶的二萜成分研究(Ⅰ)

杉科落羽杉属植物池杉 ( Taxodium ascendens Brongn.)原产于美国东南部 ,耐水湿 ,主要分布于沼泽地区及水湿地。我国江苏南京、南通和浙江杭州、河南鸡公山、湖北武汉等地有栽培 ,生长良好 ,作为低湿地的造林树种或用于庭院绿化 [1 ] 。迄今为止有关其化学成分的研究未见报道。在对杉科植物特征化学成分及其活性的系统研究中 ,我们从池杉叶的乙醇提取物中初步分离得到 3个二萜类化合物 ,通过理化性质及波谱分析 ,分别鉴定为1 8-oxoferruginol( 1 ) ,右松脂酸 ( 2 ) ,trans-communic acid( 3 )。化合物 1的质谱显示其分子离子峰为 3 0 0 ,1…     

血见愁的二萜成分

血见愁Teucrium viscidum Bl.生于海拔125—1530米的灌丛、草坡或林下湿地,在沟边溪边较常见,全草入药,能凉血解毒去瘀生新。 本样品采自西双版纳景洪,6公斤全草粉末经乙醚回流提取,回收溶剂后溶于甲醇,以活性碳脱色得澄明黄色液体,蒸干甲醇得218克黄色粗提物,经硅胶柱层析,以氯仿—丙酮作洗脱剂,得白色片状晶体9克,产率为1.5％,经波谱鉴定为tcucvin。     

Morphology, distribution, and chromosome counts of two varieties of Hedychium villosum (Zingiberaceae)

Polyploidy is a major mechanism of adaptation and speciation in plants. Two varieties of Hedychium villosum, var. villosum and var. tenuiflorum, primarily differ in plant and flower size. Chromosome number suggests that var. tenuiflorum is diploid (2n = 34) and var. villosum is tetraploid (2n = 68). Although the flowers of the two varieties do not have any difference in floral shape, each can be easily distinguished morphologically because the shoots, leaves, and flowers of the tetraploid var. villosum are consistently larger than the diploid var. tenuiflorum. The two varieties each possess distinct geographic ranges and habitats, and no sympatric distribution has been found.The tetraploid var. villosum has a broader geographic distribution range and more diverse ecological habitats than the diploid var. tenuiflorum. The two varieties are also completely reproductively isolated due to the non-overlap of their flowering times. The two varieties should be recognized as two distinct species as they fulfill the requirements of various species concepts. Thus, we suggested that the tetraploid var. villosum should be kept as Hedychium villosum and the diploid var. tenuiflorum should be renewed to Hedychium tenuiflorum.     

Morphology,distribution,and chromosome counts of two varieties of Hedychium villosum(Zingiberaceae)

Polyploidy is a major mechanism of adaptation and speciation in plants.Two varieties of Hedychium villosum,var.villosum and var.tenuiflorum,primarily differ in plant and flower size.Chromosome number suggests that var.tenuiflorum is diploid(2n=34)and var.villosum is tetraploid(2n=68).Although the flowers of the two varieties do not have any difference in floral shape,each can be easily distinguished morphologically because the shoots,leaves,and flowers of the tetraploid var.villosum are consistently larger than the diploid var.tenuiflorum.The two varieties each possess distinct geographic ranges and habitats,and no sympatric distribution has been found.The tetraploid var.villosum has a broader geographic distribution range and more diverse ecological habitats than the diploid var.tenuiflorum.The two varieties are also completely reproductively isolated due to the non-overlap of their flowering times.The two varieties should be recognized as two distinct species as they fulfill the requirements of various species concepts.Thus,we suggested that the tetraploid var.villosum should be kept as Hedychium villosum and the diploid var.tenuiflorum should be renewed to Hedychium tenuiflorum.     

滇姜花二萜成分的抗肿瘤活性研究

对滇姜花粗提物、滇姜花素A(1)和姜花酮(2)进行了动物体内抗肿瘤活性测试,结果表明它们均能显著性抑制小鼠体内移植性肿瘤H22的生长,其中滇姜花素A对小鼠H22肿瘤生长抑制率达54.27%,作用最强。体外抗肿瘤实验发现,滇姜花素C(3)对体外培养的人类乳腺癌细胞株MDA-MB-231具有较强的细胞毒作用,并具有明显的剂量效应关系。     

滇姜花中的新二萜成分-滇姜花戊素

从滇姜花根茎中分离到１个新二萜成分,命名为滇姜花戊素（１）,其结构经波谱学方法鉴定为１３β－ｆｕｒａｎｏｌａｂｄａ－８（１７）,１１－ｄｉｅｎ－６β,７α－ｄｉｏｌ。     

Hedychenone: A furanoid diterpene from Hedychium spicatum

The structure of hedychenone, a furanoid diterpene, isolated from the rhizomes of Hedychium spicatum has been deduced on the basis of spectroscopic and chemical evidence.     

The comparative reproductive biology of a tetraploid species,Hedychium villosum,and its diploid progenitor H. tenuiflorum (Zingiberaceae)

The evolutionary advantages of polyploidy may result from a number of changes in floral traits and breeding system, which may enable polyploids to exploit new habitats and become widespread. In this study, we comparatively investigated the floral biology of the tetraploid species Hedychium villosum and its diploid progenitor H. tenuiflorum, to assess reproductive divergence between the two species. The results showed that flowers of the tetraploid species last longer and produce more nectar than did diploid species. The flowering times of the two species did not overlap at all. Observations of floral visitors in natural populations demonstrated that butterflies and hawkmoths were effective pollinators of both species, but there was a significant difference in butterfly and hawkmoth assemblages between the two species. The hand‐pollination experiments and pollen tube growth experiments suggested that diploid H. tenuiflorum was self‐incompatible, while tetraploid H. villosum was completely self‐compatible. H. villosum has a much wider distribution range and occupies more diverse habitats than H. tenuiflorum. Polyploidisation may enable tetraploid H. villosum to exploit new habitats previously unavailable to diploid H. tenuiflorum.     

滇姜花中的新二萜成分--滇姜花素D

从滇姜花Ｈｅｄｙｃｈｉｕｍｙｕｎｎａｎｅｎｓｅ根茎中分离到３个二萜成分,分别为滇姜花Ｄ（１）,圆瓣姜花素Ａ（２）和ｈｅｄｙｃｈｅｎｏｎｅ（３）,（１）为新化合物,其结构经波谱学方法鉴定为１３β－ｆｕｒａｎｏｌａｂｄａ－６－ｏｘｏ－７,１１－ｄｉｅｎ－１７－ｏｌ。     

Antitumor Diterpenoids from Hedychium yunnanense and Their Photosensitized Oxidation

Two antitumor active diterpenoids, yunnancoronarin C and yunnancoronarin A, were isolated from the rhyzome of Hedychium yunnanense Gagnep. The former is a new compound, whose structure was deter- mined by spectra and chemical methods. Yunnancoronarin C could also be obtained from photosensitized oxidation of yunnancoronarin A as a minor product.