Oil from Iris rhizomes is widely used in perfumery, cosmetology, and medicine owing to its regenerative and bactericidal properties [1]. The chemical compositions of essential oils from rhizomes of I. medwedewii and I. carthaliniae (Iridaceae) have not been previously studied. I. carthaliniae Fomin and I. medwedewii Fomin are perennials with thick creeping rhizomes. They are indigenous to several Azerbaijan districts (Lankaran, Masally, Agdash, Terter) in littoral marshes, moist locations, and bottoms (I. carthaliniae) and also along dry rocky slopes in the middle belt of Diabara mountains (I. medwedewii) and in the Low Caucasus Mountains (Shakhbuz, Julfa, Gek-Gel, Dashkesan) [2].The goal of the present work was to study the constituent composition of essential oil from rhizomes of I. medwedewii and I. carthaliniae of the Azerbaijan flora. Rhizomes of both species were collected in May 2014 in Gosmalyan and Pirasora, Lerik District, and of I. carthaliniae in Masally District during flowering in natural habitats. Essential oil (EO) was obtained by steam distillation for 12 h in an apparatus consisting of a 25-mL round-bottomed flask, a reflux condenser, and a water bath. The method allows EO to be isolated from plant material with trace quantities of EO [3]. The constituent composition of the plant rhizomes was studied by GC-MS [4] on an Agilent Technologies 6890N GC with a 5973 mass-spectrometric detector. The analytical conditions were published earlier [5]. Constituents were identified using the NIST05 and Wiley 2007 mass-spectra libraries in combination with the AMDIS and NIST identification programs.The EO contents of the air-dried raw materials were 0.2% for I. carthaliniae and 0.6% for I. medwedewii. A pairwise comparison of the EO constituent compositions for the two species found 35 common constituents, 42 for I. carthaliniae and 40 for I. medwedewii. Table 1 presents the results.The contents of the constituents varied from 0.01 to 34%. The EO contained terpenoids, their O-containing derivatives (alcohols, ketones, aldehydes, esters), aromatic compounds, triterpenoids, and carboxylic acids.The EO contained acyclic and monocyclic monoterpenoids such as cis-and trans-linalool oxide, p-menth-1-en-8-ol, and terpen-4-ol. The total monoterpenoid contents were 0.4% for I. carthaliniae and 0.5% for I. medwedewii.The common sesquiterpenes for both species were E-farnesene, germacrene D, trans-caryophyllene, G-cadinene, spathulenol, caryophyllene oxide, and D-and E-cadinol. Calamenene (0.1%) was identified only in I. medwedewii; D-and E-bisabolene epoxides, in I. carthaliniae. The rare tricyclic sesquiterpenoid D-copaene, which is characteristic of Pinus sylvestris sap, was detected in EO of the plants. The sesquiterpenoid contents were 2.1% in rhizomes of I. carthaliniae and 1.1% in those of I. medwedewii.The norterpenoids E-ionone, trans-2,6-J-irone, and D-irone that give Iris oil a violet aroma were detected for the first time [6]. The norterpenoid contents in rhizomes were 0.1% for I. carthaliniae and 0.02% for...
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