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21.
Wolf-Diethard Pfeiffer Klaus-Dieter Ahlers Abiodun Falodun Alexander Villinger Peter Langer 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3):324-332
Abstract Selenoureas were prepared from isoselenocyanates and structurally characterized by spectroscopic methods and by X-ray crystal structure analyses. 相似文献
22.
Adebayo AH Jig CJ Zhang YM He WJ Zeng GZ Han HJ Xu JJ Akindahunsi AA Tana NH 《Natural product communications》2011,6(9):1263-1265
From the ethanol extract of the whole plant of Ageratum conyzoides L. (Compositae), one new chromene, 2,2-dimethylchromene 7-methoxy-6-O-beta-D-glucopyranoside, was isolated, together with thirteen known compounds, seven of which were being reported for the first time. The compounds were all characterized by MS, IR, 1D- and 2D-NMR spectroscopy. 7,3',5'-Tri-O-methyltricetin (7), precocene II (9), 3,5,7,4'-tetrahydroxyflavone (13) and 5,6,7,3',4',5'-hexamethoxyflavone (14) exhibited inhibitory activity on the P-388 cancer cell line with IC50 values of 12.8, 24.8, 3.5 and 7.8 microM respectively, while compound 9 exhibited inhibitory activity on the HT-29 cancer cell line with an IC50 value of 61 microM; the others showed no significant cytotoxic activity on the cell lines tested. 相似文献
23.
Franziska Bendrath Zharylkasyn A. Abilov Abiodun Falodun Martin Hein Alexander Villinger Peter Langer 《Helvetica chimica acta》2013,96(12):2185-2190
5‐(2‐Cyanoethyl)‐1,1′‐biphenyl‐2‐carboxylates were prepared by regioselective formal [3+3] cyclocondensations of 1,3‐bis[(trimethylsilyl)oxy]buta‐1,3‐dienes. 相似文献