7-O-Methylated anthocyanidin glycosides from Catharanthus roseus.
Anthocyanins were isolated from orange-red flowers of Catharanthus roseus cv 'Equator Deep Apricot', and identified as rosinidin 3-O-[6-O-(alpha-rhamnopyranosyl)-beta-galactopyranoside] (1), and also 7-O-methylcyanidin 3-O-[6-O-(alpha-rhamnopyranosyl)-beta-galactopyranoside] (2) by chemical and spectroscopic methods. Pigment 1 was found to be a major anthocyanin in the flowers of this cultivar. By contrast, the distribution of rosinidin glycosides is very limited in plants, and reported only in the flowers of Primula. Pigment 2 was found in smaller concentrations, but its aglycone, 7-O-methylcyanidin, has been reported only once before, from the fruit of mango.
Toki
Kenjiro
K
Laboratory of Floriculture, Faculty of Horticulture, Minami-Kyushu University, Takanabe, Miyazaki 884-0003, Japan.
Saito
Norio
N
Irie
Yuki
Y
Tatsuzawa
Fumi
F
Shigihara
Atsushi
A
Honda
Toshio
T
D000872:Anthocyanins; D030008:Catharanthus / Q000737:chemistry* / Q000254:growth & development; D035264:Flowers / Q000737:chemistry*; D005697:Galactosides / Q000737:chemistry* / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D015394:Molecular Structure; D012015:Reference Standards; D012639:Seeds / Q000737:chemistry / Q000254:growth & development; D013056:Spectrophotometry, Ultraviolet
C530529:7-O-methylcyanidin 3-O-(6-O-(alpha-rhamnopyranosyl)-beta-galactopyranoside); D000872:Anthocyanins; D005697:Galactosides; D006027:Glycosides; C530530:rosinidin 3-O-(6-O-(alpha-rhamnopyranosyl)-beta-galactopyranoside)