主题：【悬赏帖】求助springer文献5篇，谢谢！

【序号】：1
【作者】：T. Kh. Naubeev, K. K. Uteniyazov, V. V. Kachala, A. S. Shashkov
【题名】：Cycloartanes from Astragalus flexus
【期刊】：Chemistry of Natural Compounds
May 2007, Volume 43, Issue 3, p 360
【年、卷、期、起止页码】：Chemistry of Natural Compounds
May 2007, Volume 43, Issue 3, p 360
【全文链接】：http://link.springer.com/article/10.1007/s10600-007-0135-9
【序号】：2
【作者】：P. Khozhambergenova, K. F. Blinova
【题名】：Flavonoids ofAstragalus flexus
【期刊】：Chemistry of Natural Compounds
【年、卷、期、起止页码】：May–June, 1979, Volume 15, Issue 3, p 358
【全文链接】：http://link.springer.com/article/10.1007/BF00566099
【序号】：3
【作者】：M. A. Agzamova, M. I. Isaev
【题名】：Triterpene glycosides of Astragalus and their genins. XXXVIII. Cycloalpigenin D and cycloalpioside D from Astragalus alopecurus
【期刊】：Chemistry of Natural Compounds
【年、卷、期、起止页码】：May–June, 1991, Volume 27, Issue 3, pp 326-332
【全文链接】：http://link.springer.com/article/10.1007/BF00630319
【序号】：4
【作者】：M. A. Agzamova, M. I. Isaev
【题名】：Astragalus triterpene glycosides and their genins. I. Structures of cycloalpigenin and cycloalpioside
【期刊】：Astragalus triterpene glycosides and their genins. I. Structures of cycloalpigenin and cycloalpioside
【年、卷、期、起止页码】：September–October 1995, Volume 31, Issue 5, pp 589-595
【全文链接】：http://link.springer.com/article/10.1007/BF01164886
【序号】：5
【作者】：A. A. Zhanibekov, T. Kh. Naubeev, K. K. Uteniyazov, Kh. M. Bobakulov, N. D. Abdullaev
【题名】：Triterpene Glycosides from Astragalus . Structure of Cyclolehmanoside C from A. lehmannianus
【期刊】：Chemistry of Natural Compounds
【年、卷、期、起止页码】：July 2013, Volume 49, Issue 3, pp 475-477
【全文链接】：http://link.springer.com/article/10.1007/s10600-013-0642-9