STRUCTURAL ELUCIDATION OF FIVE PHENOLIC COMPOUNDS FROM THE RHIZOMES OF CURCULIGO ANNAMITICA GAGNEP
Keywords:Curculigo annamitica Gagnep (Hypoxidaceae), rhizome, phenolic compounds, 2-hydroxy-3, 4-dimethoxybenzoic acid
Phytochemical research on the chloroform and ethyl acetate extracts of the rhizome of Curculigo annamitica Gagnep (Hypoxidaceae) collected in Binh Chau-Phuoc Buu Nature Reserve, Ba Ria - Vung Tau province, led to the isolation and structural elucidation of five phenolic compounds namely 2-hydroxy-3,4-dimethoxybenzoic acid (1), 2-hydroxy-6-methoxybenzoic acid (2), 4-hydroxybenzoic acid (3), p-coumaric acid (4) and 2-(ethoxymethyl)benzene-1,4-diol (5). Their chemical structures were confirmed by spectroscopic methods including HR-ESI-MS, 1D and 2D-NMR and compared with reported data. Compound 1 was known to be present for the first time from the family Hypoxidaceae.
Keywords: Curculigo annamitica Gagnep (Hypoxidaceae), rhizome, phenolic compounds, 2-hydroxy-3,4-dimethoxybenzoic acid
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