光叶子花苞片中的甜菜色素。
Betacyanins from bracts of Bougainvillea glabra.
作者信息
Heuer S, Richter S, Metzger J W, Wray V, Nimtz M, Strack D
机构信息
Institut für Pharmazeutische Biologie, Technischen Universität Braunschweig, Germany.
出版信息
Phytochemistry. 1994 Oct;37(3):761-7. doi: 10.1016/s0031-9422(00)90354-6.
Betacyanins from the bracts of Bougainvillea glabra were isolated and characterized by a combination of spectroscopic techniques (DAD-HPLC, NMR, LC-MS, GC-MS, electrospray MS, tandem MS) as gomphrenin I (betanidin 6-O-beta-glucoside) and various derivatives of bougainvillein-v (betanidin 6-O-beta-sophoroside), i.e. mono- and diglucosylsophorosides which are acylated with 4-coumaric and caffeic acid (mono- and diesters). Besides the betacyanins, B. glabra bracts accumulated large amounts of flavonols (kaempferol and quercetin conjugates) reaching ratios of flavonol to betacyanin of 1:1.
从光叶子花苞片中分离出的甜菜色素，通过光谱技术（二极管阵列检测-高效液相色谱法、核磁共振、液相色谱-质谱联用、气相色谱-质谱联用、电喷雾质谱、串联质谱）相结合的方法进行了表征，鉴定为甜菜苷I（甜菜色素6-O-β-葡萄糖苷）和九重葛素-V的各种衍生物（甜菜色素6-O-β-槐糖苷），即单糖基和二糖基槐糖苷，它们被4-香豆酸和咖啡酸酰化（单酯和二酯）。除了甜菜色素外，光叶子花苞片还积累了大量的黄酮醇（山奈酚和槲皮素共轭物），黄酮醇与甜菜色素的比例达到1:1。
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