Flavonoids and phenylpropanoid derivatives from Campanula barbata.
Four new phenylpropanoid derivatives, barbatosides A-D, and a new catechin, barbatoflavan, were isolated from the whole plant of Campanula barbata L. (Campanulaceae) and identified as wahlenbergioside-3'-O-glucoside, wahlenbergioside-3'-O-(2'''-(p-methoxycinnamoyl))-glucoside, wahlenbergioside-3'-O-(4'''-(trans-p-coumaroyl))-glucoside, wahlenbergioside-3'-O-(4"'-(cis-p-coumaroyl))-glucoside and 3-acetyl-5-methoxy-7,3',4'-trihydroxy-8-O-glucoside-flavan-3-ol, respectively, by spectroscopic methods. In addition, four flavonols were isolated and identified as kaempferol-3-O-glucoside, kaempferol-3-O-rutinoside, quercetin-3-O-glucoside and quercetin-3-O-rutinoside. Barbatoflavan demonstrated scavenging properties towards the DPPH radical.
Institut de Pharmacognosie et Phytochemie, Université de Lausanne, BEP, CH-1015, Switzerland.
M
M
Cuendet
O
O
Potterat
K
K
Hostettmann
D019659:Asteraceae / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D016166:Free Radical Scavengers; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D044949:Kaempferols; D015394:Molecular Structure; D011794:Quercetin / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification
D005419:Flavonoids; D016166:Free Radical Scavengers; D006027:Glycosides; D044949:Kaempferols; C006552:kaempferol; D011794:Quercetin