共查询到20条相似文献,搜索用时 0 毫秒
1.
From the toad venom Ch'an Su the cardenolides I, III and V have been isolated. It is the first time that cardenolides and bufadienolides are detected simultaneously in a biological material. 相似文献
2.
3.
Niklaus Hriger Dobrila
ivanov Horst H. A. Linde Kuno Meyer 《Helvetica chimica acta》1972,55(7):2549-2562
From the toad venom Ch'an Su the bufadienolides 1, 4, 9, 10, 12, 15, 17, 20, 22, 25 and 18 , the latter as diacetate 19 were isolated and their structure elucidated. 相似文献
4.
5.
6.
7.
8.
Two new bufadienolides, isolated from Ch'an Su, are proved to be 19-oxo-cinobufagin (III) and 19-oxo-cinobufotalin (V), respectively. 相似文献
9.
10.
11.
12.
13.
14.
I. V. Nagorichna A. A. Tkachuk M. M. Garazd Ya. L. Garazd V. P. Khilya 《Chemistry of Natural Compounds》2009,45(2):164-168
Heteroarylcoumarins containing 2-indole, 3-pyrazole, and 4-pyrimidine substituents in the 6-position of the coumarin ring
were synthesized.
Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 145-148, March-April, 2009. 相似文献
15.
16.
G. K. Airapetyan M. G. Akopyan Zh. S. Arustamyan É. A. Markaryan 《Chemistry of Heterocyclic Compounds》1993,29(5):578-581
Methods have been developed for the synthesis of 1,4-benzodioxanyl-6-ethylamine with cyclopentyl and tetrahydropyranyl substituents in the -position. These compounds have been used as starting materials for the synthesis of new heterocyclic systems, the 4-spirocyclosubstituted dioxinoisoquinolines.For Communication 29, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 677–680, May, 1993. 相似文献
17.
18.
19.
Thirty three compounds were obtained from the bulbs of Urginea maritima (Liliaceae). The compounds were identified by means of fast atom bombardment mass spectrometry (FAB-MS), nuclear magnetic resonance (1H-NMR), (13C-NMR), nuclear overhauser effects (NOE) and two dimensional (2D) NMR. Ten of them were new natural compounds. Nine were bufadienolides and only one was lignan in these compounds. 相似文献
20.
Conclusions 1,2-0-(1-exo-Cyano)ethylidene-3,4-di-0-acety1-6-0-trityl- and 1,2-0-(1-exo-cyano)ethylidene-3,4-di-0-benzoyl-6-0-trityl--D-galactopyranoses were synthesized. Their polycondensation led to D-galactans, which do not contain -glycoside bonds.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya., No. 10, pp. 2358–2363, October, 1984. 相似文献