Iridoids from Symphoricarpos albus.

Twelve compounds including secologanin, loganin, the aglycon of loganin, and a new iridoid called glucologanin were isolated from fruit of common snowberry Symphoricarpos albus (L.) Blake. The structure of glucologanin was confirmed using PMR and mass spectroscopy and chemical transformations. 2′,3′,4′,6′,7-Penta- O-acetylloganin and 2′,3′,4′,6′-tetra- O-acetylloganin were synthesized. [ABSTRACT FROM AUTHOR]