Shimokawa Satoshi, Iwashina Tsukasa, Murakami Noriaki
Nat Prod Commun. 2015 Mar;10(3):451-2.
One anthocyanin and four flavonols were detected from the petals of Hibiscus hamabo, H. tiliaceus and H. glaber. They were identified as cyanidin 3-0- sambubioside, gossypetin 3-O-glucuronide-8-O-glucoside, quercetin 7-O-rutinoside, gossypetin 3-O-glucoside and gossypetin 8-O-glucuronide by UV spectra, LC-MS, acid hydrolysis and HPLC. The flavonoid composition was essentially the same among the petals ofH. hamabo, H. tiliaceus and H. glaber, and there was little quantitative variation, except for cyanidin 3-O-sambubioside, the content of which in the petals ofH. tiliaceus and H. glaber was much higher than in that of H. hamabo. Flower colors of H. tiliaceus and H. glaber change from yellow to red, and that of H. hamabo changes from yellow to orange. These changes were caused by contents of anthocyanin and flavonols, which increased after flowering of H. hamabo, H. tiliaceus and H. glaber.
从海滨木槿、黄槿和光叶木槿的花瓣中检测到一种花青素和四种黄酮醇。通过紫外光谱、液相色谱 - 质谱联用、酸水解和高效液相色谱法，它们被鉴定为矢车菊素3 - O - 接骨木二糖苷、棉黄素3 - O - 葡萄糖醛酸苷 - 8 - O - 葡萄糖苷、槲皮素7 - O - 芸香糖苷、棉黄素3 - O - 葡萄糖苷和棉黄素8 - O - 葡萄糖醛酸苷。海滨木槿、黄槿和光叶木槿花瓣中的黄酮类化合物组成基本相同，除矢车菊素3 - O - 接骨木二糖苷外，定量变化很小，黄槿和光叶木槿花瓣中矢车菊素3 - O - 接骨木二糖苷的含量远高于海滨木槿。黄槿和光叶木槿的花色从黄色变为红色，海滨木槿的花色从黄色变为橙色。这些变化是由花青素和黄酮醇的含量引起的，它们在海滨木槿、黄槿和光叶木槿开花后增加。
