Rhoipteleanins A and E, dimeric ellagitannins formed by intermolecular C–C oxidative coupling from Rhoiptelea chiliantha
Abstract
The first dimeric ellagitannins, rhoipteleanins A and E, generated biogenetically by intermolecular C–C oxidative coupling, are isolated from the fruits of Rhoiptelea chiliantha and structurally elucidated on the basis of spectroscopic and chemical evidence.