pentacyclic

简明释义

英[ˌpentəˈsaɪklɪk]美[pentəˈsaɪklɪk]

adj. 五环的

英英释义

单词用法

同义词

反义词

例句

1.Ginsenoside, the main components of ginseng, is dammarane tetracyclic triterpenoids or hong resin alkyl type pentacyclic triterpene, which has not yet been synthesized artificially.

其主要功能成分是人参皂苷，即达玛烷型四环三萜类或香树脂烷型五环三萜类化合物，至今人参皂苷尚未能人工合成。

2.Pentacyclic triterpenes are among the most important bioactive compounds and biotransformation is a very useful tool to carry out the structural modification on these compounds.

五环三萜是一类重要的天然产物，研究发现生物转化能够对该类化合物进行多种类型的结构修饰。

3.Aim: to search for novel modulators of glycogen metabolism through structural modifications of natural pentacyclic triterpenes.

目的：对天然五环三萜进行结构修饰，寻找新型糖原代谢调控药物。

4.Ursolic acid, a pentacyclic triterpene compound, naturally occurs in a large variety of plants, has attracted considerable interest owing to its significant biological activities.

熊果酸属于五环三萜类化合物，广泛存在于天然植物中，具有多种显著的药理活性。

5.Typical markers are the porphyrins, pristine, phytane, steranes, carotenes and pentacyclic triterpanes.

典型的标志如卟啉、姥鲛烷、植烷、留烷、胡萝卜烷、以及五环三萜烷。

6.Olympic pentacyclic ring is symbolizing five continents' unity, world athlete by fair, frank competition and friendly spirit, meets at the Olympic Games.

奥运五环象征着五大洲的团结，世界的运动员以公平，坦率和友好的竞争精神，在奥运会上见面。

7.Ginsenoside, the main components of ginseng, is dammarane tetracyclic triterpenoids or hong resin alkyl type pentacyclic triterpene, which has not yet been synthesized artificially.

其主要功能成分是人参皂苷，即达玛烷型四环三萜类或香树脂烷型五环三萜类化合物，至今人参皂苷尚未能人工合成。

8.The sufferers exhibited evident local signs with mild systemic reaction. The management of the wound included wet compress wi th the addition of neomycin and pentacyclic guanosine.

患者以局部症状为主，全身反应较轻，外用新霉素加无环鸟苷湿敷效果较好。

9.This article is reviewing the structure-activity relationship of pentacyclic triterpenes.

笔者讨论了一些五环三萜类化合物的药理活性与结构的关系。

10.Researchers are exploring pentacyclic 五环的 compounds for their potential in cancer treatment.

研究人员正在探索五环的化合物在癌症治疗中的潜力。

11.The drug is based on a novel pentacyclic 五环的 structure that enhances its efficacy.

这种药物基于一种新颖的五环的结构，增强了其疗效。

12.The pentacyclic 五环的 framework is crucial for the stability of the molecule.

该五环的框架对分子的稳定性至关重要。

13.Synthetic methods for creating pentacyclic 五环的 structures have advanced significantly.

合成五环的结构的方法已经取得了显著进展。

14.The pentacyclic 五环的 nature of this compound allows for unique interactions with proteins.

该化合物的五环的特性允许与蛋白质发生独特的相互作用。

作文

In the realm of organic chemistry, certain compounds exhibit complex structures that can be categorized based on their cyclic arrangements. One such classification is known as pentacyclic, which refers to compounds that contain five interconnected rings in their molecular structure. These types of compounds are of significant interest due to their unique properties and potential applications in various fields, including pharmaceuticals, materials science, and environmental chemistry.The term pentacyclic derives from the prefix 'penta-' meaning five, and 'cyclic' indicating a ring structure. This nomenclature highlights the fundamental characteristic of these compounds: their intricate arrangement of five rings that can either be fused or linked together. The structural complexity of pentacyclic compounds often leads to diverse chemical behaviors, making them valuable for research and development.One prominent example of a pentacyclic compound is the steroid framework, which is vital in biochemistry. Steroids, such as cholesterol and testosterone, possess a core structure that includes multiple fused rings, typically arranged in a way that aligns with the definition of pentacyclic. These compounds play crucial roles in biological systems, influencing everything from cellular membrane integrity to hormone regulation. Understanding the pentacyclic nature of steroids allows scientists to explore how modifications to these structures can lead to variations in biological activity.Moreover, pentacyclic compounds are also found in various natural products, including alkaloids and terpenes. For instance, the well-known alkaloid, quinine, has a pentacyclic structure that contributes to its effectiveness in treating malaria. The study of such compounds not only sheds light on their medicinal properties but also inspires the synthesis of new drugs that mimic or enhance their effects.In materials science, pentacyclic compounds have garnered attention for their potential use in creating advanced materials. Their unique electronic and optical properties make them suitable candidates for applications in organic electronics, photovoltaics, and sensors. Researchers are investigating how the structural features of pentacyclic compounds can be harnessed to develop innovative materials that outperform traditional substances in terms of efficiency and functionality.Additionally, the environmental implications of pentacyclic compounds cannot be overlooked. Certain pentacyclic aromatic hydrocarbons (PAHs), which are byproducts of incomplete combustion processes, pose significant risks to human health and the environment. Understanding the chemistry and behavior of these compounds is essential for developing strategies to mitigate their impact and enhance pollution control measures.In conclusion, the study of pentacyclic compounds offers a fascinating glimpse into the complexities of organic chemistry and its applications across various disciplines. From their role in biological systems to their potential in advanced materials and environmental science, pentacyclic compounds exemplify the intricacies of molecular structures and their profound influence on our world. As research continues to unveil the mysteries of these compounds, we can anticipate exciting developments that will further our understanding and utilization of pentacyclic structures in both science and industry.

在有机化学领域，某些化合物展示出复杂的结构，可以根据其环状排列进行分类。其中一种分类被称为五环，指的是含有五个相互连接的环的化合物。这类化合物因其独特的性质和在制药、材料科学及环境化学等多个领域的潜在应用而受到广泛关注。术语五环源于前缀“penta-”，意为五，和“cyclic”，表示环状结构。这一命名法强调了这些化合物的基本特征：它们由五个环组成的复杂排列，这些环可以是融合的或链接在一起的。五环化合物的结构复杂性通常导致多样的化学行为，使它们在研究和开发中具有重要价值。一个著名的五环化合物例子是类固醇框架，这在生物化学中至关重要。类固醇，如胆固醇和睾酮，具有多个融合环的核心结构，通常以符合五环定义的方式排列。这些化合物在生物系统中发挥着关键作用，影响着从细胞膜完整性到激素调节的一切。理解类固醇的五环特性使科学家能够探索对这些结构的修改如何导致生物活性的变化。此外，五环化合物也存在于各种天然产物中，包括生物碱和萜烯。例如，著名的生物碱奎宁，其五环结构促成了其治疗疟疾的有效性。对这类化合物的研究不仅揭示了它们的药用特性，还激发了合成新药物以模仿或增强其效果的灵感。在材料科学中，五环化合物因其在创建先进材料中的潜在用途而引起关注。它们独特的电子和光学特性使它们成为有机电子学、光伏和传感器应用的合适候选者。研究人员正在调查如何利用五环化合物的结构特征来开发在效率和功能上超越传统物质的创新材料。此外，五环化合物的环境影响也不容忽视。某些五环芳香烃（PAHs）是不完全燃烧过程的副产品，对人类健康和环境构成重大风险。理解这些化合物的化学性质和行为对于制定减轻其影响和增强污染控制措施的策略至关重要。总之，五环化合物的研究提供了对有机化学复杂性及其在各学科应用中的迷人洞察。从它们在生物系统中的作用到在先进材料和环境科学中的潜力，五环化合物体现了分子结构的复杂性及其对我们世界的深远影响。随着研究不断揭示这些化合物的奥秘，我们可以期待激动人心的发展，进一步加深我们对五环结构在科学和工业中应用的理解。