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