Essential oils from the inflorescences of Tagetes argentina Cabr., T. terniflora H.B.K., T. laxa Cabr. and T. filifolia Lag. from Argentina were studied by GC/MS. The oils of T. argentina and T. laxa were found to be rich in (E)- and (Z)-tagetenone (<60.0%), while T. terniflora oil contained (Z)-tagetone (<68.2%) as major constituent. The oil of T. filifolia possessed a characteristic compoisition where (E)-anethole and methyl chavicol together accounted for more than 97% of the oil.
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Zygadlo et al. (1993) studied this question.
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