Buscar
Mostrando ítems 21-30 de 707
Chemistry and biological activity of alkaloids from the genus Schizanthus
(Springer Netherlands, 2020)
© 2019, Springer Nature B.V.The genus Schizanthus (Solanaceae) comprises 12 accepted species primarily endemic to Chile. It is characterized by the presence of numerous tropane alkaloids found as ester derivatives of ...
Chemistry and biological activity of alkaloids from the genus Schizanthus
(Springer, 2020)
The genusSchizanthus(Solanaceae) comprises 12 accepted species primarily endemic to Chile. It is characterized by the presence of numerous tropane alkaloids found as ester derivatives of isomeric acids like angelic, ...
Absolute configuration of lippifoliane and africanane derivatives
(American Chemical Society, 2005-05)
The absolute configuration of naturally occurring lippifoliane derivatives isolated from the widely used plant Lippia integrifolia was assigned by analysis of the circular dichroism data in combination with density functional ...
Albendazole sulfoxide enantiomers: Preparative chiral separation and absolute stereochemistry
(Elsevier B.V., 2012-03-23)
The enantiomeric separation of albendazole sulfoxide was carried out by simulated moving bed chromatography with variable zones (VARICOL). An overall recovery of 97% was achieved and enantiomeric ratios of 99.5% for raffinate ...
Albendazole sulfoxide enantiomers: Preparative chiral separation and absolute stereochemistry
(Elsevier B.V., 2012-03-23)
The enantiomeric separation of albendazole sulfoxide was carried out by simulated moving bed chromatography with variable zones (VARICOL). An overall recovery of 97% was achieved and enantiomeric ratios of 99.5% for raffinate ...
Synthesis and Anti-HIV Activity of Lupane and Olean-18-ene Derivatives. Absolute Configuration of 19,20-Epoxylupanes by VCD
(American Chemical Society, 2012-03)
Lupane triterpenoids 2 and 5–12 and oleanene derivatives 13 and 14 were prepared from lupeol (1), betulin (3), and germanicol (4). They were tested for anti-HIV activity, and some structure–activity relationships were ...
Assignment of the absolute configuration at the sulfur atom of thioridazine metabolites by the analysis of their chiroptical properties: The case of thioridazine 2-sulfoxide
(ELSEVIER SCIENCE BV, 2010)
Thioridazine (THD) is a commonly prescribed phenotiazine neuroleptic drug, which is extensively biotransformed in the organism producing as main metabolites sulfoxides and a sulfone by sulfur oxidation Significant differences ...
Absolute configuration reassignment of two chromanes from Peperomia obtusifolia (Piperaceae) using VCD and DFT calculations
(Pergamon-Elsevier B.V. Ltd, 2010-10-07)
Previous analysis of the ECD spectra of two prenylated benzopyrans isolated from Peperomia obtusifolia, by means of the helicity rule for the chromane chromophore, resulted in the incorrect assignment of their absolute ...