Natural occurrence: Peppermint oil, cornmint oil, penny royal oil, buchu oil and heater beef fat.3-Methylcyclohexanone may be used as a reference standard for the identification and quantification of volatile components of essential oils of Passiflora hybrids by gas chromatography/flame ionization detector (GC/FID) Natural occurrence: Peppermint oil, cornmint oil, penny royal oil, buchu oil and heater beef fat.3-Methylcyclohexanone may be used as a reference standard for the identification and quantification of volatile components of essential oils of Passiflora hybrids by gas chromatography/flame ionization detector (GC/FID)