Investigation and chromatographic separation of some phenolic compounds from flowers of Mentha longifolia l. and Mentha spicata l. growing in Iraq

Five of active phenolic compounds: Hydroquinone, Resorcinol, Coumarin, Vanillin and Gallic acid were separated and investigated by high performance liquid chromatography (HPLC) technique from the crude of ethanolic extract of Mentha longifolia L. and Mentha spicata L. and the retention time adopted as a base to investigation of those compounds.The results showed that the crude extracts of the species under study contains of Hydroquinone also Gallic acid compounds while those extracts differed in their content of other studied phenolic compounds, however the crude extract of M. longifolia distinguished by presence of Resorcinol and Vanillin, while Coumarin was limit in M. spicata crude extract only