Chiral GC analysis of (1R)(+)‐pulegone with high enantiomeric purity in essential oils of some lamiaceae aromatic plants

Abstract (1 R )(+)‐Pulegone with high enantiomeric purity (95–100%) was detected in the essential oils from fresh leaves of Mentha piperita L., M. longifolia (L.) Huds., M. pulegium L., M. sylvestris L., Calamintha incána (Sm.) Heldr. and Micromeria fruticosa . L. High enantiomeric purities were found in samples of commercial (+)‐ and (—)‐pulegone. Direct enantiomeric separation was performed using a Cyclodex B chiral capillary column.