New 19α-hydroxyursane-type triterpenes from the leaves of Meyna spinosa (= Vangueria spinosa), Rubiaceae

- Two new ursanes and one new aliphatic from leaves of Meyna spinosa (Rubiaceae).
- New 19α-hydroxyursanes were characterized by extensive 2D-NMR studies.
- Five known compounds were also isolated from this plant.