Chemical constituents from Portulaca oleracea L.

Objective To separate and identify the chemical constituents of the extract from the Portulaca oleracea L.Methods The compounds were separated by repeated silica gel SephadexLH-20 and ODS.The structures of these isolated compounds were identified by analysis of their spectral data(1H-NMR,13C-NMR)and chemical properties.Results Eight compounds were isolated from Portulaca oleracea L.and their structures were identified as 1H-pyrrole-2,5-dicarboxylic acid(1),5-hydroxy-2-pyridinecarboxylic acid(2),oleracein B(3),3,4-dihydroxybenzoic acid(4),friedelin(5),4α-methyl-3β-hydroxylfriedelan(6),lupeol(7)and cyclo(L-leucinyl-L-tyrosinyl)(8).Conclusions Compounds 1,2 and 8 are isolated from Portulaca for the first time.