title: A new acylated anthocyanin from the red flowers of Camellia hongkongensis and characterization of anthocyanins in the section Camellia species.
abstract: Twelve anthocyanins (1-12) were isolated from the red flowers of Camellia hongkongensis Seem. by chromatography using open columns. Their structures were elucidated on the basis of spectroscopic analyses, that is, proton-nuclear magnetic resonance, carbon 13-nuclear magnetic resonance, heteronuclear multiple quantum correlation, heteronuclear multiple bond correlation, high resolution electrospray ionization mass and ultraviolet visible spectroscopies. Out of these anthocyanins, a novel acylated anthocyanin, cyanidin 3-O-(6-O-(Z)-p-coumaroyl)-beta-galactopyranoside (6), two known acylated anthocyanins, cyanidin 3-O-(6-O-(E)-p-coumaroyl)-beta-galactopyranoside (7) and cyanidin 3-O-(6-O-(E)-caffeoyl)-beta-galactopyranoside (8), and three known delphinidin glycosides (10-12) were for the first time isolated from the genus Camellia. Furthermore, pigment components in C. japonica L., C. chekiangoleosa Hu and C. semiserrata Chi were studied. The results indicated that the distribution of anthocyanins was differed among these species. Delphinidin glycoside was only detected in the flowers of C. hongkongensis, which is a special and important species in the section Camellia. Based on the characterization of anthocyanins in the section Camellia species, there is a close relationship among these species, and C. hongkongensis might be an important parent for creating new cultivars with bluish flower color.
authors.affiliation: Department of Horticultural Science, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan.
authors.forename: Jian-Bin
authors.initials: JB
authors.lastname: Li
authors.forename: Fumio
authors.initials: F
authors.lastname: Hashimoto
authors.forename: Keiichi
authors.initials: K
authors.lastname: Shimizu
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Sakata
mesh_terms: D000215:Acylation; D000872:Anthocyanins / Q000737:chemistry / Q000302:isolation & purification*; D028244:Camellia / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D035264:Flowers / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010858:Pigmentation
chemical_list: D000872:Anthocyanins