Abstract The leaf and inflorescence oils of Ocimum micranthum Willd. were investigated by GC (retention time data), GC/MS and 13C-NMR spectroscopy. The main constituents in the leaves were eugenol (44.8%) and Î²-caryophyllene (14.7%), whereas in the inflorescence elemicin (32.9%) and eugenol (14.0%) were the major compounds