Alkaloids from Portulaca oleracea L

Five alkaloids (oleraceins A, B, C, D and E) were isolated from Portulaca oleracea L., together with other known constituents including p-coumaric acid, ferulic acid and adenosine. Five alkaloids (oleraceins A, B, C, D and E) were isolated from Portulaca oleracea L., and their structures determined by spectroscopic methods as 5-hydroxy-1- p-coumaric acyl-2,3-dihydro-1 H-indole-2-carboxylic acid-6- O-β- d-glucopyranoside, 5-hydroxy-1-ferulic acyl-2,3-dihydro-1 H-indole-2-carboxylic acid-6- O-β- d-glucopyranoside, 5-hydroxy-1-( p-coumaric acyl-7′- O-β- d-glucopyranose)-2,3-dihydro-1 H-indole-2-carboxylic acid-6- O-β- d-glucopyranoside, 5-hydroxy-1-(ferulic acyl-7′- O-β- d-glucopyranose)-2,3-dihydro-1 H-indole-2-carboxylic acid-6- O-β- d-glucopyranoside and 8,9-dihydroxy-1,5,6,10b-tetrahydro-2 H-pyrrolo[2,1-a]isoquinolin-3-one, respectively.