title: Alkylated benzoquinones from Iris kumaonensis.
abstract: Six novel alkylated p-Benzoquinones irisoquin (A-F) (1-2, 4-7) together with a known cytotoxic quinone, irisoquin (3) along with three known isoflavones, tectoregenin, iristectorin and irigenin were isolated from the rhizomes of Iris kumaonensis and characterized. The structures of compounds 1-2, 4-7 were confirmed by extensive spectroscopic analysis, IR, MS, HRMS, GC, GC-MS, 1D (1H, 13C, NOE) and 2D (HMQC and HMBC) NMR and comparison with literature data of known compounds.
authors.affiliation: Department of Natural Plant Products, Institute of Himalayan Bioresource Technology, Box No 6, - 176 061 (HP), Palampur, India.
authors.forename: Umar
authors.initials: U
authors.lastname: Mahmood
authors.forename: Vijay K
authors.initials: VK
authors.lastname: Kaul
authors.forename: Leopold
authors.initials: L
authors.lastname: Jirovetz
mesh_terms: D016227:Benzoquinones / Q000737:chemistry* / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry; D027621:Iridaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D015394:Molecular Structure; D027343:Rhizome / Q000737:chemistry
chemical_list: D016227:Benzoquinones