New salicin derivatives from the leaves of Populus euphratica.

Chemical investigation of the leaves of Populus euphratica Oliv. led to the isolation and identification of 13 compounds for the first time, among which 6'-O-cis-cinnamoylsalicin (1) and 6'-O-benzoylsalicortinol (2) were new compounds. The spectral data of 6'-O-trans-cinnamoylsalicin (3) and salicortinol (4) were reported for the first time. Their structures were elucidated on the basis of detailed spectroscopic analysis and comparisons with literature values.