满天星中的黄酮类化合物及其抗氧化活性

Flavonoids from Gypsophila elegans and their antioxidant activities

对石竹科花卉植物满天星(Gypsophila elegans)进行化学成分研究,通过波谱技术鉴定化合物结构,得到6个黄酮苷化合物,分别为2″-O-α-L-阿拉伯糖异荭草苷(1)、芹黄素-6-C-[β-D-吡喃木糖基-(1″′→2″)-β-D-吡喃半乳糖基]-7-O-β-D-吡喃葡萄糖苷(2)、芹黄素-8-C-β-D-吡喃葡萄糖苷(3)、肥皂草苷(4)、芹黄素-7-O-槐糖苷(5)、异牡荆素-2″-O-β-D-吡喃葡萄糖苷(6).除化合物4为首次从该植物中分离得到外,其它化合物均为首次从石竹科植物中分离得到.并采用DPPH自由基清除模型对分离得到的化合物进行了抗氧化活性筛选,化合物1显示出强抗氧化活性.

The chemical constituents from Gypsophila elegans（Caryophyllaceae）were studied and six flavonoids were isolated.The structures of these compounds were identified by spectral data as isoorientin-2″-O-α-L-arabinopyranosyl（1）,apigenin-6-C-[β-D-xylopyranosyl-（1″′→2″）-β-D-galactopyranoside]-7-O-β-D-glucopyranoside（2）,apigenin-8-C-β-D-glucopyranoside（3）,saponarin（4）,apigenin-7-O-sophoroside（5） and isovitexin-2″-O-β-D-glucopyranoside（6）.Compound（4） was first isolated from this plant and others five compounds were obtained from Caryophyllaceae family for the first time.Their antioxidant activities were also investigated by DPPH method,1 showed antioxidant activity.