Diastereomeric identification of neolignan rhamnosides from Trochodendron aralioides leaves by LC-SPE-NMR and circular dichroism

Trochodendron aralioides is an old-existing relic plant with limited availability and only a few identified compounds. Accumulative analysis on the methanolic extract from its leaf part by LC-SPE-NMR resulted in the identification of seven new compounds, including three neolignan α-rhamnosides [(7R,8S)-dihydrodehydrodiconiferyl alcohol- 9-O-α-rhamnopyranoside (2) and 9′-O-α-rhamnopyranoside (3), and (7S,8R)-dehydrodiconiferyl...