采用密度泛函理论方法在B3LYP/6-31G(d)水平上对1,2-二苯基-2-[(1-苯乙基)氨基]乙醇分子进行了量子化学计算,quantum chemical calculation获得了分子的轨道能、键长、键角和电荷分布的数据,得出1,2-二苯基-2-[(1-苯乙基)氨基]乙醇分子...采用密度泛函理论方法在B3LYP/6-31G(d)水平上对1,2-二苯基-2-[(1-苯乙基)氨基]乙醇分子进行了量子化学计算,quantum chemical calculation获得了分子的轨道能、键长、键角和电荷分布的数据,得出1,2-二苯基-2-[(1-苯乙基)氨基]乙醇分子结构稳定,活性低,分子内难形成氢键的结论,为1,2-二苯基-2-[(1-苯乙基)氨基]乙醇分子晶体性质的研究提供了理论基础。展开更多
Cultivation of an endophytic fungus Aspergillus niger EN-13 that was isolated from the inner tissue of the marine brown alga Colpomenia sinuosa resulted in the characterization of a new naphthoquinoneimine derivative,...Cultivation of an endophytic fungus Aspergillus niger EN-13 that was isolated from the inner tissue of the marine brown alga Colpomenia sinuosa resulted in the characterization of a new naphthoquinoneimine derivative, namely, 5,7-dihydroxy-2-[1-（4- methoxy-6-oxo-6H-pyran-2-yl）-2-phenylethylamino]-[ 1,4]naphthoquinone. The structure of the new compound was established on the basis of various NMR spectroscopic analyses including 2D NMR techniques, El-MS, and HR-ESI-MS. This compound displayed moderate antifungal activity.展开更多
文摘采用密度泛函理论方法在B3LYP/6-31G(d)水平上对1,2-二苯基-2-[(1-苯乙基)氨基]乙醇分子进行了量子化学计算,quantum chemical calculation获得了分子的轨道能、键长、键角和电荷分布的数据,得出1,2-二苯基-2-[(1-苯乙基)氨基]乙醇分子结构稳定,活性低,分子内难形成氢键的结论,为1,2-二苯基-2-[(1-苯乙基)氨基]乙醇分子晶体性质的研究提供了理论基础。
基金partially supported by the fund of Key Laboratory of Marine Drugs(0cean University of China),Ministry of Education[KLMD(0UC)2004]by the National Natural Science Foundation of China(No.30530080)+1 种基金A program supported by the Department of Science and Technology of Shandong Province(No.2006GG2205023)by the Guangdong Key Laboratory of Marine Materia Medica is also gratefully acknowledged.
文摘Cultivation of an endophytic fungus Aspergillus niger EN-13 that was isolated from the inner tissue of the marine brown alga Colpomenia sinuosa resulted in the characterization of a new naphthoquinoneimine derivative, namely, 5,7-dihydroxy-2-[1-（4- methoxy-6-oxo-6H-pyran-2-yl）-2-phenylethylamino]-[ 1,4]naphthoquinone. The structure of the new compound was established on the basis of various NMR spectroscopic analyses including 2D NMR techniques, El-MS, and HR-ESI-MS. This compound displayed moderate antifungal activity.
文摘目的:建立测定米拉贝隆原料中有关物质的方法。方法:采用HPLC方法分离分析米拉贝隆的有关物质,使用Cosmosil C18(250 mm×4.6 mm,5μm)色谱柱;流动相A为10 mmol·L^(-1)庚烷磺酸钠+20 mmol·L^(-1)磷酸二氢钾溶液(用磷酸调至p H 3.0)-乙腈(90∶10),流动相B为乙腈,梯度洗脱,流速1.0 m L·min^(-1),检测波长220 nm,柱温35℃;采用流动相A为0.1%乙酸(用氨水调至p H 3.0)-乙腈(90∶10),流动相B为乙腈,梯度洗脱,利用LC-MS/MS方法进行鉴别。结果:米拉贝隆与有关物质均能有效分离;LC-MS/MS鉴定了3种主要降解产物:杂质a(2-氨基噻唑-4-乙酸,化合物4)、杂质b((R)-2-[[[2-(4-氨基苯基)乙基]氨基]甲基]苯甲醇,化合物8)和杂质c(2-(2-氨基噻唑-4-基)-N-[4-[2-(苯基乙基氨基)乙基]苯基]乙酰胺,化合物9)的定量限分别为7.02、7.32和9.18 ng,且在各自的线性范围内线性关系良好(r=1.000、0.999 0、1.000,n=5);校正因子分别为1.4、1.6和1.3。结论:建立的方法可对米拉贝隆的有关物质进行定量测定。
