Method for isolating (+)-cyclic olive resinin from the plant Stereospermumpersonatum, said method comprising the steps of:
a) extracting dried wood powder of Stereospermumpersonatum with hexane;
b) further extraction of the residue of step a) with chloroform;
c) concentrating the chloroform solution of step b) under vacuum;
d) adsorption of the dark brown extract on silica gel (60-120 mesh) and loading on a silica gel (60-120 mesh) column (4 cm diameter to 100 cm height);
e) elution of this silica gel column with a chloroform methanol gradient; and
f) collecting the eluted fractions with 5% methanol dissolved in chloroform and concentrating to obtain pure (+)-cyclic olive resinin.
