Three new phenylethanoid glycosides from Caryopteris incana and their antioxidative activity.
Three new phenylethanoid glycosides, incanoside C, incanoside D and incanoside E were isolated together with one known glycoside, beta-D-fructofuranosyl-alpha-D-(6-O-[E]-sinapoyl) glucopyranoside from the whole plant of Caryopteris incana (THUNB.) Miq. On the basis of chemical and spectral analyses, the structures of the new compounds were elucidated to be 1-O-(3,4-dihydroxyphenyl)ethyl-O-beta-D-glucopyranosyl(1-->2)-alpha-L- rhamnopyranosyl(1-->3)-4-O-feruloyl-beta-D-glucopyranoside (incanoside C), 1-O-(3-hydroxy-4-methoxyphenyl)ethyl-O-beta-D-glucopyranosyl(1-->2)-alph a-L- rhamnopyranosyl(1-->3)-4-O-feruloyl-beta-D-glucopyranoside (incanoside D) and 1-O-(3methoxy-4-hydroxyphenyl)ethyl-O-beta-D-glucopyranosyl(1-->2) -alpha-L- rhamnopyranosyl(l-->3)-4-O-feruloyl-beta-D-glucopyranoside (incanoside E). The three new phenylethanoid glycosides exhibited radical scavenging activities against DPPH radical and inhibitory activities against the oxidation of linoleic acid.
Gao
J
J
Faculty of Agriculture, Yamagata University, Tsuruoka-shi, Japan.
Igarashi
K
K
Nukina
M
M
D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D015764:Bepridil / Q000031:analogs & derivatives* / Q000378:metabolism; D001713:Biphenyl Compounds; D003124:Colorimetry; D016166:Free Radical Scavengers / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D019686:Lamiaceae / Q000737:chemistry*; D010851:Picrates
D000975:Antioxidants; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D006027:Glycosides; D010851:Picrates; C417444:incanoside C; C417445:incanoside D; C417446:incanoside E; D015764:Bepridil; C004931:1,1-diphenyl-2-picrylhydrazyl