Malonylated anthocyanins from bulbs of red onion, Allium cepa L.
Four cyanidin-based anthocyanins (1-4) were isolated from the red onion, Allium cepa L. Pigments 1 and 3 were identified as cyanidin 3-glucoside (Cy 3-Glc) and 3-malonylglucoside (Cy 3-MaGlc), respectively, by cochromatography with standard pigments. Anthocyanins 2 and 4 were respectively determined as cyanidin 3-laminaribioside (Cy 3-Lam) and 3-malonyllaminaribioside (Cy 3-MaLam), a new anthocyanin, mainly by NMR techniques. Malonylated anthocyanins 3 and 4 were found for the first time in red onions.
Terahara
N
N
Department of Food Science and Technology, College of Horticulture, Minami-Kyushu University, Miyazaki, Japan.
Yamaguchi
M
M
Honda
T
T
D000490:Allium / Q000737:chemistry*; D000872:Anthocyanins / Q000737:chemistry / Q000302:isolation & purification*; D002240:Carbohydrate Sequence; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013056:Spectrophotometry, Ultraviolet
D000872:Anthocyanins