The chemical composition of 40 samples of essential oil of Calamintha nepeta, growing wild in Corsica, was examined. After a preliminary study on a single plant, which allowed definition of the full blossom as the stable period for harvesting, the existence of three chemotypes was demonstrated. Half of the samples were characterized by a menthone/pulegone chemotype, 13 samples present pulegone as the major component associated with menthone, while piperitone and piperitenone oxides were the main components of the last 11 samples.
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Baldovini et al. (2000) studied this question.
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