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    Essential oil of Stachys aleurites from Turkey
    (Pergamon-Elsevier Science Ltd, 2005) Flamini, G; Cioni, PL; Morelli, I; Celik, S; Gokturk, RS; Unal, O
    The essential oil obtained from the aerial parts of the Turkish endemism Siachys aleurites (Lamiaceae) has been studied. The main constituents were sesquiterpene hydrocarbons: beta-caryophyllene (33.7%), bicyclogermacrene (14.5%) and germacrene D (9.6%). The main monoterpene was alpha-pinene (8.4%). Some chernotax(o)nomical considerations have been provided. (C) 2004 Elsevier Ltd. All rights reserved.
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    Two acylated flavonoid glycosides from Stachys bombycina, and their free radical scavenging activity
    (Govi-Verlag Pharmazeutischer Verlag Gmbh, 2005) Delazar, A; Celik, S; Göktürk, RS; Unal, O; Nahar, L; Sarker, SD
    Preparative reversed-phase HPLC analysis of the methanol extract of the aerial parts of Stachys bombycina (Lamiaceae) afforded two acylated flavonoids glycosides, chrysoeriol 7-O[6-O-acetyl-beta-D-allopyranosyl]-(1 --> 2)-beta-D-glucopyranoside (1) and apigenin 7-O-beta-D-(6-p-coumaroyl)-glucopyranoside (2), the former being a new natural product. The structures of these compounds were elucidated unambiguously by UV spectroscopic analyses using shift reagents, ESIMS, and 1D and 2D NMR spectroscopic techniques. The free radical scavenging activity of 1 and 2 compounds were assessed by DPPH assay, and the RC50 values were 1.25 x 10(-2) and 7.69 x 10(-4) mg/mL, respectively.