Results 151 to 160 of about 2,370 (198)
Some of the next articles are maybe not open access.
Synthesis of cardenolide glycosides and putative biosynthetic precursors of cardenolide glycosides
Steroids, 1998A rapid and efficient procedure for glycosylation of steroids was established using a modified Koenigs-Knorr procedure. Peracetylated beta-glycosides were synthesized by reaction of cardenolides, various pregnanes and 23-nor-5,20(22)E-choldienic acid at room temperature with the peracetylated 1-bromo derivatives of D-glucose, D-galactose, D-fucose and ...
M, Luta, A, Hensel, W, Kreis
openaire +2 more sources
Cytotoxic cardenolides and sesquiterpenoids from the fruits of Reevesia formosana
Phytochemistry, 2016 [[abstract]]Bioassay-guided fractionation of the fruits of Reevesia formosana led to isolation of three cardenolides (reevesioside J, reevesioside K, and epi-reevesioside K), three sesquiterpenoids (reevesiterpenol C, reevesiterpenol D, and ...
Shiow-Ju Lee +2 more
exaly +2 more sources
Chemistry of Natural Compounds, 2005
3-Keto-derivatives of the cardenolides digitoxigenin and cardiogenin were prepared with subsequent conversion to new ketoimines (1–19, 24–44), the oxime (23), and for the first time to pure cardiogenin (14,16-dianhydrogitoxigenin, 20), its acetate (21), and cardiogenone (22). Their physicochemical properties were described.
I. F. Makarevich +2 more
openaire +1 more source
3-Keto-derivatives of the cardenolides digitoxigenin and cardiogenin were prepared with subsequent conversion to new ketoimines (1–19, 24–44), the oxime (23), and for the first time to pure cardiogenin (14,16-dianhydrogitoxigenin, 20), its acetate (21), and cardiogenone (22). Their physicochemical properties were described.
I. F. Makarevich +2 more
openaire +1 more source
In vitro culture of Digitalis L. (Foxglove) and the production of cardenolides: An up-to-date review
Industrial Crops and Products, 2016 Digitalis L. (Foxglove, Plantaginaceae) genus is a representative of several medicinal ornamental plants that are widely used in the production of herbal medicines.
, Ashok Kumar Das, Ekrem Gürel
exaly +2 more sources
Chemischer Informationsdienst, 1984
AbstractBehandeln der Cardenolide (I) mit NaH in DMF, anschließen de Zugabe der Alkylhalogenide (II) binnen fünf Minuten und Ansäuern der Ansätze liefern die Monoalkylderivate (III) als Hauptprodukte, daneben die Dialkylderivate (IV).
B. STRECKENBACH +4 more
openaire +1 more source
AbstractBehandeln der Cardenolide (I) mit NaH in DMF, anschließen de Zugabe der Alkylhalogenide (II) binnen fünf Minuten und Ansäuern der Ansätze liefern die Monoalkylderivate (III) als Hauptprodukte, daneben die Dialkylderivate (IV).
B. STRECKENBACH +4 more
openaire +1 more source
Cardenolides from Nierembergia aristata
Journal of Natural Products, 1995The EtOAc extract of the whole plant of the Argentinian species Nierembergia aristata showed significant cytotoxicity against eleven different cancer cell lines. In addition to several known compounds, bioassay-guided fractionation led to the isolation of three new cardenolides, 17-epi-11 alpha-hydroxy-6, 7-dehydrostrophanthidin-3-O-beta ...
R R, Gil +4 more
openaire +2 more sources
Ring-D fragmentation of cardenolides
Biological Mass Spectrometry, 1977The major fragmentation paths typical for the cardenolides system have been elucidated by labelling studies.
E, Flaskamp, H, Budzikiewicz
openaire +2 more sources
Cardenolides from Erysimum cheiranthoides
Phytochemistry, 1996Three new cardiac glycosides were isolated along with two known cardenolides from the seeds of Erysimum cheiranthoides. The new ones were characterized by spectral methods as 16 beta-hydroxystrophanthidin (strophadogenin) 3-O-beta-glucopyranosyl-(1-->4)-beta-boiviopyranoside, strophadogenin 3-O-alpha-rhamnopyranosyl-(1-->4)-beta-digitoxopyranoside and ...
Z H, Lei +4 more
openaire +2 more sources
ChemInform Abstract: CARDENOLIDES. I. RING D CLEAVAGE OF CARDENOLIDES
Chemischer Informationsdienst, 1982AbstractDie Einwirkung von Ozon auf die Cardadienolide (I) und nachfolgende reduktive Aufarbeitung führen überraschenderweise nicht zum Abbau des Butenolidringes, sondern nahezu ausschließlich zur D‐Ringspaltung unter Bildung der 14,1 S‐Seeocardenolide (IIa) und (IIb) bzw. (Ile).
E. COHNEN, K. WEDEMEIER, V. SINNWELL
openaire +1 more source
Cytotoxic cardenolides and antibacterial terpenoids from Crossopetalum gaumeri
Phytochemistry, 2000 From the methanol ext. of the roots of Crossopetalum gaumeri, four new highly cytotoxic cardenolides, securigenin-3beta -O-beta -6-deoxyguloside, 19-hydroxy-sarmentogenin-3beta -O-beta -6-deoxyguloside, sarmentogenin-3beta -O-[alpha -allosyl-(1-> 4)-beta
Jörg Heilmann +2 more
exaly +2 more sources