• Archives of Pharmacal Research
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• v.14 no.3
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• pp.225-230
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• 1991

From the roots of Rubus parvifolius L., four triterpenoidal sapogenins, ursolic acid 1. $2\alpha$-hydroxyursolic acid 2. causapic acid 3. $2\alpha$, $3\beta$, $19\alpha$-trihydroxyurs-12-en-23.28-dioic acid 4 and one triterpenoidal glycoside. suavissimoside $R_1$ 5. were isolated. The structures were elucidated by spectroscopic methods and chemical transformations. Compound 4 was first isolated as free form.