Conversion of Aristolochic Acid I into Aristolic Acid by Reaction with Cysteine and Glutathione: Biological Implications
作者:Horacio A. Priestap、Manuel A. Barbieri
DOI:10.1021/np300822b
日期:2013.5.24
Aristolochic acid I (AA-I), naturally occurring in Aristolochia plants, is a potent nephrotoxin and carcinogen. Here we report that AA-I suffers hydrogenolysis with loss of the nitro group by reaction with cysteine or glutathione to give aristolic acid. Since the reaction can proceed in aqueous solutions at pH 7.0 and 37 °C, it is inferred that it may also occur in biological systems and contribute
Methylendioxyphenathrene and stilben derivatives, process for the
申请人:Madaus GmbH & Co.
公开号:US05024743A1
公开(公告)日:1991-06-18
The present invention provides compounds of the general formula: ##STR1## where R.sub.1 is a hydrogen atom or a methoxy or ethoxy radical and R.sub.2 and R.sub.3 are hydrogen atoms or R.sub.2 and R.sub.3 together represent an aromatic carbon-carbon bond and R.sub.1 is a hydrogen atom, a hydroxyl group or an ethoxy radical; and the pharmaceutically acceptable salts thereof. The present invention also provides processes for the preparation of these compounds and pharmaceutical compositions containing them, as well as their use in therapy.
Achari, Basudeb; Bandyopadhyay, Soumitra; Saha, Chitta R., Heterocycles, 1983, vol. 20, # 5, p. 771 - 774
作者:Achari, Basudeb、Bandyopadhyay, Soumitra、Saha, Chitta R.、Pakrashi, Satyesh C.
DOI:——
日期:——
Carbon-13 NMR spectra of some phenanthrene derivatives fromAristolochia indica and their analogues
作者:Basudeb Achari、Soumitra Bandyopadhyay、Ajit K. Chakravarty、Satyesh C. Pakrashi
DOI:10.1002/mrc.1270221202
日期:1984.12
Abstract13C NMR spectra of compounds related to aristolochic acid and aristololactam, the constituents of Aristolochia indica, have been studied to determine the chemical shifts and coupling constants of polysubstituted phenanthrenes. Selective 1H decoupling and long‐range couplings were utilized for the assignments. Substituent‐induced chemical shifts and also the effects on coupling constants could be deduced in some cases. Anion formation was found to be particularly helpful in the interpretation of the spectra of carboxylic compounds. Shift assignments of some structurally related compounds could also be made.