Carboxylic Acids from Iris graminea and I. halophila
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Plants of the genus Iris L. (Iridaceae) are broadly distributed in most countries , appear in the flora of Ukraine , and are widely cultivated . Previously, hydroxycinnamic acids, flavonoids , isoflavonoids, xanthones [5, 6], and coumarins  were observed in iris rhizomes. The goal of the present study was to compare the qualitative compositions and quantitative contents of carboxylic acids in leaves and rhizomes of the two cultivated species I. graminea L. and I. halophila in the flora of Ukraine using a GC-MS method.
The specimens were collected in botanical gardens and parks in Ukraine, e.g., V. N. Karazin Kharkov National University (Kharkov), Oleksandriya Dendrological Park, National Academy of Sciences of Ukraine (Bila Tserkva, Kiev Oblast); and Dolina Irisov Nature Park (Vinnytsya Oblast), during flowering (April-May) from 2012 to 2017. Methyl esters of carboxylic acids were analyzed as before  using an Agilent Technologies 5973N/6890N MSD/DS GC-MS (USA).
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