Isolation of the Essential Oil
The oil was obtained from fresh ¯owers by hydro-
distillation in a Neo-Clevenger apparatus for 5±6 h.
The moisture content of the ¯owers was determined by
drying in an oven at 508C until no further change in
weight was observed. The density of the essential oil
was determined by using an Anton Parr Model DMA
48, its refractive index by using a Shimadzu Bausch and
Lamb Abbe Refractometer, and its optical rotation by
using a Bellingham and Stanley Digital Polarimeter
Model P20.