Essential oil composition of the fruit oils of Piperchaba, P. longum and P.
nigrum were investigated by GC and GC/MS. Unlike P. nigrum oil, P. chaba a
nd P. longum oils were found to contain few monoterpene hydrocarbons, a mod
erate content of sesquiterpenes and high content of aliphatic hydrocarbons.
The content of caryophyllene oxide (7.4%) was the highest in P. chaha and
that of beta-caryophyllene was found to be 33.7%, 10.2% and 5.2% in, P. nig
rum, P. longum and P. chaba, respectively.