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OBJECTIVE: To investigate the chemical constituents from the whole plants of Lagopsis supina. METHODS: The compounds were isolated and purified by various column chromatography, and their structures were identified based on their physiochemical properties and spectroscopic data. RESULTS: Thirteen compounds were isolated from the n-hexane, dichloromethane, and water extracts of the whole plants of Lagopsis supina by using various chromatographic methods. Their structures were identified as phytol(1), daucosterol(2), 8-O-acetylharpagide(3), antirrinoside(4), ajugoside(5), ajugol(6), harpagide(7), 1-O-caffeoyl-β-D-glucopyranose(8), 1-O-coumaroyl-β-D-glucopyranose(9), 2-hydroxy-5-(2-hydroxyethyl)phenyl-1-O-β-D-glucopyranoside(10), methyl 2-O-β-D-glucopyranosylbenzoate(11), adenosine(12), and sucrose(13), respectively. CONCLUSION: Compounds 1 and 3-13 are isolated from the plants of Lagopsis genus for the first time.
RESUMO
Objective To build an HPLC-ELSD method for simultaneous determination of 8-O-acetylharpagide and harpagide inAjuga decumbens Thunb.;To determineAjuga decumbens Thunb. samples from different area and of different batches.Methods Chromatographic separation was achieved on a Dikma C18 column (4.6 mm×150 mm, 5μm). The mobile phase consisted of water (A) and acetonitrile (B), using a gradient elution of 5% B at 0-6 min, 5%-15% B at 6-11 min, 15% B at 11-17 min, and the flow rate was 1.0 mL/min. An evaporative light scattering-detector (ELSD) was used with the temperature of drift tube at 103℃ and the gas flow rate of air was at 1.6 L/min.Results Good linearity was shown at the concentration range of 0.017-17.32μg for 8-O-acetylharpagide, and 0.003-1.62μg for harpagide. The validated method was of great precision and accuracy. The contents of 8-O-acetylharpagide and harpagide inAjuga decumbens Thunb. from Fujian province were higher than the contents in other localities.Conclusion The content of harpagide can be used as index component to monitor quality control ofAjuga decumbens Thunb..