Abstract From the methanol extract of Portulaca oleracea , a new monoterpeneglucoside, portuloside A, has been isolated. The structure of portuloside A was established by spectroscopic methods and then confirmed to be (3S)-3-(3,7- dimethylocta -1,7- dien -6- onyl )-β- d - glucopyranoside by synthesis from linalool.