A New Sesquiterpene-substituted Benzoic Acid from the Brown Alga Dictyopteris divaricata

来源 :Chinese Chemical Letters | 被引量 : 0次 | 上传用户:fyz123456
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A new sesquiterpene-substituted benzoic acid has been isolated from the brown Alga Dictyopteris divaricata Okam.. Its structure was elucidated as 3-[(2-hydroxy-2,5,5,8a-tetra- methyldecahydro-1-naphthalenyl)methyl]-4-hydroxybenzoic acid, named dictyvaric acid on the basis of spectroscopic methods including IR, HRFABMS, 1D and 2D NMR techniques. A new sesquiterpene-substituted benzoic acid has been isolated from the brown Alga Dictyopteris divaricata Okam .. Its structure was elucidated as 3 - [(2-hydroxy-2,5,5,8a-tetra- methyldecahydro-1-naphthalenyl) methyl] -4-hydroxybenzoic acid, named dictyvaric acid on the basis of spectroscopic methods including IR, HRFABMS, 1D and 2D NMR techniques.
其他文献
肺炎克雷伯菌为条件致病菌,可引起肺炎、败血症等多种化脓性炎症,近年来肺炎克雷伯菌也成为医院内感染的主要致病菌之一。研究表明,菌毛作为细菌重要的毒力因子之一,在细菌黏
糖尿病可引起微循环及神经系统病变,累及全身及各个器官,伴有听力减退已有报告。本文对49例(97耳)糖尿病患者测试发现41例(81耳)听力减退,其中以高频,中高频声力减退为主。
视网膜母细胞瘤是最常见的眼内恶性肿瘤,一般诊断多无困难。临床与病理的复合率也是比较高的。但是一些临床少见的表现,给诊断和治疗造成困难,甚至误诊失去治疗机会。自1982
留白是中国画的一种手法.在整幅画中留下空白,给人以想象的余地,这种“以无胜有”的留白艺术,具有较高的审美价值.作画是这样,教学亦是如此. 每一个文本,无论有多少详尽的细
期刊
眼眶血管瘤能引起眼球突出、复视、严重弱视、睑下垂和继发性青光眼。若由海绵状及毛细血管性二种血管瘤引起的眼部并发症并不严重,那就不一定需要治疗。毛细血管瘤早在婴儿
Continuous furnaces are widely used in the heat treatment of mass-produced parts. However, the heating up process of parts in continuous furnace is still decide
Three kinds of commercial activated carbons, such as Norit RB1, Monolith and Chemviron activated carbons, were used as adsorbents for adsorption of dibenzofuran
叶剑英:民之利剑叶剑英在家中排行第二,父亲很喜欢这个儿子。按照叶氏族谱,给他取了个名字叫叶宜伟。1917年夏,叶剑英和几个同学冒着盛夏酷暑,长途跋涉来到中国西南边陲名城
黄安伦(1949)是中国最出色的钢琴作曲家,同时也是作品范围丰富的多产作曲家。他是中央音乐学院黄飞立教授之子,自幼具有良好的音乐天赋和素养,马思聪曾评论他“有很丰富的想
Direct investigation of the electronic structure of catalyst surfaces on the near-atomic scale in general has not been impossible in the past. However, with the