Triterpene-saponins of the roots of Soldanella alpina L

The genus Soldanella L. (Primulaceae) is one of only 27 genera endemic to Europe and occurs in 16 species in the European Alpine system. The presented study represents the first phytochemical investigation of a member of the genus. Investigation of the roots of S. alpina L. afforded three triterpene-saponins which were identified as 3β,16α-dihydroxy-13β,28-epoxyolean-30-al 3-O-[(O-β-D-glucopyranosyl-(1→2)-O-[O-α-L-arabinopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)]-α-L-arabinopyranoside)] (1); 3β,16α-dihydroxy-13β,28-epoxyolean-30-al 3-O-[(O-β-D-glucopyranosyl-(1→2)-O-[O-β-D-xylopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)]-α-L-arabinopyranoside)]=deglucocyclamin (2) and 3β,16α,23-trihydroxy-13β,28-epoxyolean-30-al 3-O-[(O-β-D-glucopyranosyl-(1→2)-O-[O-α-L-arabinopyranosyl-(1→2)-β-D-glucopyranosyl-(1→4)]-α-L-arabinopyranoside)] (3). Compound 1 and 3 represent two novel natural products, while compound 2 was identified as deglucocyclamin, which was previous described from different cyclamen species.