Saito N, Tatsuzawa F, Yoda K, Yokoi M, Kasahara K, Iida S, Shigihara A, Honda T
Chemical Laboratory, Meiji-Gakuin University, Yokohama, Japan.
Phytochemistry. 1995 Nov;40(4):1283-9. doi: 10.1016/0031-9422(95)00369-i.
Six acylated cyanidin glycosides were isolated from violet-blue flowers of Ipomoea purpurea. These anthocyanins were all based on cyanidin 3-sophoroside-5-glucoside, acylated with caffeic acid and/or p-coumaric acid. Three anthocyanin structures were elucidated to be cyanidin 3-O(-)[2-O-(6-O-(trans-3-O-(beta-D-glucopyranosyl)caffeyl)-beta -D-glucopyranosyl)-6-O-(trans-4-O-(6-O-(trans-caffeyl)-beta-D-glucopyran osyl) caffeyl)-beta-D-glucopyranoside]-5-O(-)[beta-D-glucopyranoside], cyanidin 3-O(-)[2-O-(trans-3-O-(beta-D-glucopyranosyl)caffeyl)-beta-D-glucopyrano syl)- 6-O-(trans-caffeyl)-beta-D-glucopyranoside]-5-O(-)[beta-D-glucopyranosid e d and cyanidin 3-O(-)[2-O-(6-O-(trans-caffeyl)-beta-D-glucopyranosyl)-6-O- (trans-caffeyl)-beta-D-glucopyranoside]-5-O(-)[beta-D-glucopyranoside]. These three anthocyanins were present in all 12 violet-blue flower strains as major pigments. The colours of these acylated antocyanins were stabler in neutral solution than their deacyl analogues.
从紫牵牛的紫蓝色花朵中分离出六种酰化矢车菊苷元糖苷。这些花青素均基于矢车菊素3 - 槐糖苷 - 5 - 葡萄糖苷，由咖啡酸和/或对香豆酸酰化而成。三种花青素结构被鉴定为矢车菊素3 - O(-)[2 - O-(6 - O-(反式 - 3 - O-(β - D - 吡喃葡萄糖基)咖啡酰基)-β - D - 吡喃葡萄糖基)-6 - O-(反式 - 4 - O-(6 - O-(反式 - 咖啡酰基)-β - D - 吡喃葡萄糖基)咖啡酰基)-β - D - 吡喃葡萄糖苷]-5 - O(-)[β - D - 吡喃葡萄糖苷]、矢车菊素3 - O(-)[2 - O-(反式 - 3 - O-(β - D - 吡喃葡萄糖基)咖啡酰基)-β - D - 吡喃葡萄糖基)-6 - O-(反式 - 咖啡酰基)-β - D - 吡喃葡萄糖苷]-5 - O(-)[β - D - 吡喃葡萄糖苷]和矢车菊素3 - O(-)[2 - O-(6 - O-(反式 - 咖啡酰基)-β - D - 吡喃葡萄糖基)-6 - O-(反式 - 咖啡酰基)-β - D - 吡喃葡萄糖苷]-5 - O(-)[β - D - 吡喃葡萄糖苷]。这三种花青素在所有12个紫蓝色花朵菌株中均作为主要色素存在。这些酰化花青素在中性溶液中的颜色比其脱酰类似物更稳定。
