Two structurally novel cytotoxic ent-kaurene diterpenoids, 13-methoxy-15-oxozoapatlin and 13-hydroxy-15-oxozoapatlin, were isolated from the root bark of Parinari curatellifolia, together with the known compound, 15-oxozoapatlin, on the basis of bioactivity-guided chromatographic fractionation and
BACKGROUND
Parinari kerstingii Engl. extract is traditionally used for the treatment of inflammation, bronchopneumonia, feverish pains, and breast cancer. However, there have not been any scientific reports regarding the medicinal properties of this plant, and no experiments have been done to