Phytochemical investigation of Tabebuia palmeri

Abstract

Phytochemical investigation of the stems, flowers, and leaves of Tabebuia palmeri has led to the isolation of a novel compound, 6-(1-hydroxyundec-3-enyl)-tetrahydropyran-2-one, and 16 known compounds, viz. 1-hexadecanol, 1-triacontanol, stigmast-5-en-3β-ol, 2-hydroxy-3-(3-methylbut-2-enyl)-1,4-naphthoquinone (lapachol), methyl 3,4-dimethoxybenzoate, 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione, 3,4-dimethoxybenzoic acid, 4-hydroxybenzoic acid, 3,4-dihydroxybenzoic acid, 3β-hydroxy-12-ursen-28-oic acid, 5,7,4β-trihydroxyflavone, β-sitosteryl-β-D-galactoside, 6-O-(p-hydroxybenzoyl)-epiaucubin, 4-O-β-D-glucosylbenzoic acid, 9Z,12Z-octadecadienoic acid, and hexadecanoic acid. Except lapachol, all these phytoconstituents were isolated from the Tabebuia palmeri for the first time, and their structures were established on the basis of spectral data analysis and chemical reactions.