Terpen-derivate aus Senecio-arten

Anti-inflammatory activity of a new triterpenoid saponin from carthamus tinctorius linn

“…The filtrate was concentrated under reduced pressure and subjected to paper chromatography examination using nBAW The sequence of the sugar residue in compound E was confirmed by its partial hydrolysis [25] and D-galactose. These linkages were further confirmed by its 13 C-NMR spectral data (see in Experimental Section). Periodate oxidation [28] of compound A confirmed that the three sugars were present in pyranose form.…”

“…It was identified as 3b-hydroxy lup-12-ene-28-oic acid by comparison of its m.m.p., co-tlc, and spectral data i.e. 1 H-NMR, mass., 13 C-NMR with reported literature values [21].…”

“…The disaccharide sugar chain was linked to C-3 and one monosaccharide unit was attached to C-28. In the 13 C-NMR spectrum (see Table I [11,12] of compound C which showed a characteristic feature of D 12 unsaturated triterpenoids [13]. Formation of fragment ion m/z at 248 showed the presence of a hydroxyl group at C-3 position.…”

“…It was crystallized from methanol to yield light yellowish needles (1.85 219,208,207,205,203,191,190,189,160,145. Compound A was also characterized by 13 C-NMR spectrum (see Table I). Alkaline hydrolysis of Compound A.…”

Photomediated transformation of eremophilanes-I: Photooxidation of 2ß-angeloyloxy-10ß-H-furanoeremophilane

“…antiradical property, toxicity 19,20 and antifeedant 21 activity. We have initially investigated photooxidation of 2β-angeloyloxy-10β-H-furanoeremophilane 22 (1) in its reaction with singlet oxygen ( 1 O 2 ) in different reaction media.…”