Chemical constituents of stems of Knema saxatilis
Abstract
Phytochemical study of Knema saxatilis stems led to the isolation of six known compounds. Their chemical structures were determined as 8-hydroxy eriodictyol ( 1 ), (2 S )-7-hydroxy-3′,4′-methylenedioxideflavan ( 2 ), sitostenone ( 3 ) , protocatechuic acid (4) , 4-hydroxybenzoic acid (5) and vanillin (6) using NMR and MS spectral data. Among the isolated compounds, compounds 1 and 3-6 were reported for the first time from the genus Knema.