Structure of anthocyanin from the blue petals of Phacelia campanularia and its blue flower color development
作者:Mihoko Mori、Tadao Kondo、Kenjiro Toki、Kumi Yoshida
DOI:10.1016/j.phytochem.2005.12.024
日期:2006.3
The dicaffeoyl anthocyanin, phacelianin, was isolated from blue petals of Phacelia campanularia. Its structure was determined to be 3-O-(6-O-(4'-O-(6-O-(4'-O-beta-d-glucopyranosyl-(E)-caffeoyl)-beta-d-glucopyranosyl)-(E)-caffeoyl)-beta-d-glucopyranosyl)-5-O-(6-O-malonyl-beta-d-glucopyranosyl)delphinidin. The CD of the blue petals of the phacelia showed a strong negative Cotton effect and that of the
双咖啡酰花青素,phacelianin,是从Phacelia campanularia 的蓝色花瓣中分离出来的。其结构被确定为 3-O-(6-O-(4'-O-(6-O-(4'-O-β-d-吡喃葡萄糖基-(E)-caffeoyl)-β-d-吡喃葡萄糖基)-(E)-咖啡酰)-β-d-吡喃葡萄糖基)-5-O-(6-O-丙二酰-β-d-吡喃葡萄糖基)飞燕草素。phacelia蓝色花瓣的CD显示出强烈的负Cotton效应,有色原生质体悬浮液的CD相同,表明phacelianin的生色团可能在蓝色液泡中以逆时针堆积的方式进行分子间堆积. 在弱酸性水溶液中,phacelianin 在 CD 中显示出与花瓣相同的蓝色和负棉花效应。然而,在没有金属离子的情况下逐渐形成蓝黑色沉淀。可能需要极少量的 Al(3+) 或 Fe(3+) 来稳定蓝色溶液。Phacelianin 可能同时采取分子间和分子内堆积的形式,通