Chemical constituents and pharmacological activities of Sedum aizoon form Guizhou province / 中草药

ABSTRACT

Objective: To study the chemical constituents of Sedum aizoon and to screen the anti-oxidant activities and α-glucosidase inhibitory activities of compounds. Methods: The compounds were separated and purified by various chromatographic techniques, and their structures were identified by physio-chemical properties and EI-MS, ESI-MS, 1H and 13C NMR. The anti-oxidant activity of compounds was screened by DPPH method. The obtained compounds were subjected to detection of α-glucosidase inhibitory activity by PNPG method. Results: Seventeen compounds were isolated from S. aizoon, which were identified as iriflophene (1), kaempferol (2), quercetin (3), myricetin (4), rhamnazin-3-O-β-D-glucopyranoside (5), isolariciresinol-9-O-β-D-glucopyranoside (6),myricitrime (7), myricetin-3-O-α-L-arabinopyranoside (8), iriflophenone-2-O-β-D-glucopyranoside (9), 2-O-(trans-caffeoyl)-malic acid 1-methyl-ester (10), 2-O-(trans-caffeoyl)-malic acid 1,4-dimethyl ester (11), 2-O-(trans-caffeoyl) malic acid (12), p-coumaric acid (13), ethyl gallate (14), butanedioic acid (15), 9(Z)-octadece-namide (16), and lotaustralin (17). Conclusion: Compounds 13 and 15 are isolated from S. aizoon for the first time. Compounds 9-12, and 16 are isolated from genus Sedum for the first time. Compounds 2, 3, 7, 8, 10, 12, and 14 had significant anti-oxidant activity. Compounds 8 showed moderate α-glucosidase inhibitory activity in vitro. Compound 3 showed strong α-glucosidase inhibitory activity in vitro.