化合物

Fifteen novel 1,4-naphthoquinones, rhinacanthin-A -D, rhinacanone-A -K and two new biphenyl compounds, rhinacanim-A,-B together with eleven known compounds have been isolated and characterized from the root of Rhinacanthus nasutus Kurz.

中文摘要从白鹤灵芝草的根部甲醇抽取物中经过各种层析分离纯化后共得到15种新的1，4-naphthoquinone类化合物，分别命名为Rhinacanthin-A至-D，Rhinacanone-A至-K及二种新的Biphenyl化合物，Rhinacanim-A，-B和11种已知化合物。

We have investigated on the chemical constituents of Nepeta partite collected from Gansu Zhuanglang, and twenty eight compounds were isolated from the methanol extraction of this species by chromatography techniques. Twenty five compounds were identified by means of chemical and spectra methods IR, FABMS, EI-MS,〓, DEPT, and 2D NMR）, among which four compounds were new as isopimar-15-en-3β, 8β, 20-triol; phenylethanal-3-O-（2'-glycerin）-5-O-β-D-glucopyranoside; 3-O-linolenoylglyceryl-6'-O-(α-D-galactopyranosyl）-β-D-galactopyranoside; ethyl rosemarinate.

我们对采自甘肃庄浪的康藏荆芥进行了化学成分的研究，利用层析手段从该植物的甲醇浸膏中分离出二十八个化合物，经化学方法和波谱技术（红外，质谱，一维和二维核磁共振谱）鉴定了二十五个化合物的结构，其中四个为新的化合物，它们分别是：异海松-15-烯-3β，8β，20-三醇；苯乙醇-3-O-（2'-甘油基）-5-O-β-D-吡喃葡萄糖甙；3-O-亚麻酰基甘油-6'-0--β-D-吡喃半乳糖甙；迷迭香酸乙酯。

This section includes the nonindustrial preparation, purication, and reactions of inoganic substances:elements; inorganic acids, bases, and salts; synthetic minerals; inclusion compounds;charge-transfer complexes; coordination compounds containing inoganic and organic ligands;nonmetal and metalloid compounds; and carbon-containing compounds such as the carbon oxides, metal carbonyls, carbonates and transition metal carbonxylates.

这一章节涵盖了无机物的非工业制备、提纯、及反应：元素；无机酸、基团和盐类；合成矿物质；包藏复合物；转移电荷复合物；包含了无机和有机配合基的配位化合物；非金属与非金属化合物；以及含碳化合物，如碳氧化物、金属羰基、碳酸盐和含有羰基的过渡金属等。

OxazoleⅠand methyl oxazole Ⅱ,key intermediates of leucamide A which is a natural ocean material,were prepared from L-serine,L-alanine and L-threonine by two different methods.

以L-丝氨酸、L-丙氨酸和L-苏氨酸为起始原料，采用两种不同的方法分别合成了天然海洋化合物Leucam ide A的关键中间体口恶唑化合物Ⅰ及甲基口恶唑化合物Ⅱ。

Terpenoids had business with the life of humanbeings. The last twenty years developments of tricyclic diterpenoids were reviewed.Biologic activities of tricyclic diterpenes which had oxygenous guoups on the 1, 2 or 3 position were reviewed. The important applications and some methods of introducing oxygenous groups on these three positions in recent 20 years were also obtained.

萜类化合物与人类生活密切相关，本文简要介绍了近二十年来三环二萜类化合物的最新研究进展，综述了在C-1、C-2、C-3号位上具有含氧官能团的三环二萜类化合物的生物活性、重要应用，并报道了近二十年来在这三个位置上引入含氧官能团的一些常见方法。

KDML 105, a well known traditional Thai jasmine rice variety, is sweet aromatic rice. Although rice aroma combines more than 200 volatile compounds, a compound named 2-acetyl-1-pyrroline (2AP) is the main constituent. The aromatic 2AP has also been found in other cereals, pandan, bread flower, fungi and bacteria.

泰国农业大学网站消息，众所周知，KDML 105是一个特异的泰国芳香水稻品种，尽管稻米的香味是由200多种不稳定的化合物形成，但其中一种叫乙酰基吡咯啉（2-acetyl-1-pyrroline）的化合物是这种香味形成的主要成分，在其他谷类、班兰、真菌和细菌中也发现了这种化合物。

The results of asymmetric reduction of latent chiral ketones by carbonyl reductase showed that the enzyme had a high specificity for pentanone in aliphatic ketones and for the acetophenone derivates that contained a withdrawing group at α-position.

利用羰基还原酶不对称催化还原潜手性酮类化合物发现，对于芳香酮类化合物，酶对α位为强电负性基团的底物专一性较强；对于脂肪酮类化合物，酶对五碳脂肪酮的专性较高。

The influence factors on decomposition efficiency, such as digestion time and pH were identified. It was shown that non-condensed phosphate could be decomposed completely by persulphate.

结果表明：在碱性条件下过二硫酸钾高温氧化可使海水中非聚磷类化合物完全回收，而聚磷类化合物回收率不高，延长消化时间聚磷类化合物的回收率有一定提高。

The influence factors on decomposition efficiency, such as digestion time and pH were identified. It was shown that non-condensed phosphate could be decomposed completely by persulphate. But in alkali condition, condensed phosphate can only be decomposed partly.

结果表明：在碱性条件下过二硫酸钾高温氧化可使海水中非聚磷类化合物完全回收，而聚磷类化合物回收率不高，延长消化时间聚磷类化合物的回收率有一定提高。

The influence factors on decomposition efficency, such as digestion time and pH were identified. It was shown that noncondition phosphate could be decomposed completely by persulphate. But in alkali condition, condensed phosphate could only be decomposed partly.

结果表明，在碱性条件下过二硫酸钾高温氧化可使海水中非聚磷类化合物完全回收，而聚磷类化合物回收率不高，延长消化时间聚磷类化合物的回收率有一定提高。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。