Abstract
Two new triterpene acids were isolated from the plant Cornulaca monacantha DEL. The first acid was assigned the structure 3β, 6α-dihydroxyolean-12-en-27-oic acid I and was given the trivial name manevalic acid. The other compound was assigned the structure 3β, 6α-dihydroxyolean-12-en-27, 28-dioic acid II and named azizic acid. These assignments were based on spectral and chemical studies. The chemical correlation between manevalic acid and the known triterpene astilbic acid, 3β, 6β-dihydroxyolean-12-en-27-oic acid, was established through oxidation of their methyl esters to methyl 3, 6-dioxoolean-12-en-27-oate IC.
