Fully dried materials were pulverized into fine powder by
use of a hammer mill until the powder passed through 1mm
mesh sieve. 1 kg of the powdered material was soaked in
hexane for four days, constantly stirred over that period and
then decanted leaving soluble hexane fraction. The solvent was
then evaporated in a Rotary Evaporator ® at 60 ºC leaving
behind the essential oil. The crude extract obtained was dried,
precipitated and crystals of camphor were removed