The volatile oils isolated by steam distillation from the leaves and roots of Eryngium foetidum were analyzed by capillary GC, GC/MS and 1H-NMR. Alkanals and alkenals constituted the main chemical category in the leaf oil which contained (E)-2-dodecenal as the most abundant component (59.72%). In contrast, the root oil contained high amounts of aromatic and terpene aldehydes, among which 2,3,6-trimethylbenzaldehyde (37.55%) and 2-formyl-1,1,5-trimethylcyclohexa-2,4-dien-6-ol (19.82%) predominated. Most of the constituents identified in the present study have not been previously reported in the essential oil of E. foetidum.
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Wong et al. (1994) studied this question.