Three new triterpenoid glycosides, 2α,3α,23,24-tetrahydroxyurs-12,19- dien-oic acid 28-O-β- D -glucopyranoside (1), 2α,3β,23,24-tetrahydroxyurs-12, 19(29) -dien-28-oic acid 28-O-β- D -glucopyranoside (2), and 2α,3β,23,24-tetrahydroxyurs-12, 18-dien-28-oic acid 28-O-β- D -glucopyranoside (3) were isolated from Aronia melanocarpa (Michx.) Elliott. Their structures were elucidated by extensive spectroscopic methods. All the isolated compounds displayed moderate inhibitory activity against nitric oxide production in macrophages.
Keywords: Anti-inhibitory activity; Aronia melanocarpa; triterpenoid glycosides; ursane triterpenes.