A new flavonol glycoside and activity of compounds from the flower of Nymphaea candida

作者：Liu R N; Wang W; Ding Y; Xie W D; Ma C; Du L J^*

来源：Journal of Asian Natural Products Research, 2007, 9(4): 333-338.

DOI：10.1080/10286020600727665

• flavonoid
• kaempferol 3-O-(2 ''-O-galloylrutinoside)
• cytotoxicity
• neuroprotection
• antioxidation
• Nymphaea candida

A new compound, kaempferol 3-O-(2''-O-galloylrutinoside) (1), was isolated from the white flower of Nymphaea candida, together with nine known flavonol glycosides, kaempferol (2), kaempferol 3-O-beta-D-glucopyranoside (3), kaempferol 3-O-alpha-L-rhamnopyranoside (4), kaempferol 3-O-alpha-L-rhamnopyranosylglucopyranoside (5), kaempferol 7-O-beta-D-glucopyranoside 3-(O-alpha-L-rhamnopyranosylglucopyranoside) (6), quercetin (7), quercetin 3-O-b-D-xylopyranoside (8), myricetin (9), myricetin 30-O-beta-D-xylopyranoside (10). The structure of 1 was established on the basis of the analysis of its 1D and 2D NMR spectral data. Compounds 1 -7 and 9 exhibited moderate to significant antioxidant activities, which were evaluated by measurement of low-density lipoprotein (LDL) and malondialdehyde (MDA) levels in vitro. Compounds 1, 3, 4, 6 and 9 exhibited promising neuroprotective effects on ischemic injury model of cultured rat cortical neurons treated with sodium dithionite in glucose-free medium. Furthermore, compounds 1, 5, and 9 had distinct cytotoxicity to adrenal gland pheochromocytoma, PC12 cells, being treated by the same way.

• 出版日期2007
• 单位清华大学