Paeonianins A-E, new dimeric and monomeric ellagitannins from the fruits of Paeonia lactiflora.
Four new dimeric ellagitannins, paeonianins A-D (2-5), were isolated from the fruits of Paeonia lactiflora, together with a new ellagitannin monomer, paeonianin E (1). Their structures were determined by spectroscopic methods. Paeonianins A-D (2-5) are positional isomers formed by condensation of pentagalloyl-beta-D-glucose (8) with 5-desgalloylstachyurin (6) or casuariin (7). Paeonianin E is a C-glycosidic ellagitannin having a gallic acid methyl ester moiety at the glucose C-1 position. This is the first report of the isolation of dimeric ellagitannins from a plant in the family Paeoniaceae.
Tanaka
Takashi
T
Department of Molecular Medicinal Sciences, Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
Fukumori
Masatake
M
Ochi
Tomoko
T
Kouno
Isao
I
D005638:Fruit / Q000737:chemistry; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D047348:Hydrolyzable Tannins; D007564:Japan; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D029596:Paeonia / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D013237:Stereoisomerism; D013634:Tannins / Q000737:chemistry / Q000302:isolation & purification*
D005960:Glucosides; D047348:Hydrolyzable Tannins; D013634:Tannins; C013515:ellagitannin