Chemical constituents from rizomes of Homalomena occulta

Column chromatography on silica gel and Sephadex LH-20 was used to study the chemical constituents of Homalomena occulta. The chemical structures of the separated compounds were elucidated by spectroscopic data analyseS.Twelve compounds were obtained and identified as 5-pentylresorcinol-b-glucoside(1), protocatechuic acid(2), 4-hydroxybenzoic acid(3), vanillic acid(4), 5-hydroxymethyl-2-furancarboxylic acid(5), 2-furoic acid(6), 5-hydroxymethyl-2-furfural(7), (R)-malic acid(8), (R)-dimethyl malate(9), trimethyl 1, 2, 3-propanetricarboxylate(10), 4-hydroxytetrahydrofuran-2-one(11) and (1S, 2S, 4S)-p-menthane-1, 2, 4-triol(12). Among them, compound 1 was a new natural product, and compounds 4-12 were isolated from the genus for the first time.