title: Five new peltogynoids from underground parts of Iris bungei: a Mongolian medicinal plant.
abstract: Five new peltogynoids, irisoids A-E (1-5), have been isolated from the underground parts of Iris bungei. The structures of the new compounds were established on the basis of spectroscopic methods and were found to be 1,8,10-trihydroxy-9-methoxy-[1]benzopyrano-[3,2-c][2]-benzopyran-7(5H)-one (1), 1,8-dihydroxy-9,10-dimethoxy-[1]benzopyrano-[3,2-c][2]-benzopyran-7(5H)-one (2), 1,10-dihydroxy-8,9-dimethoxy-[1]benzopyrano-13,2-c][2]-benzopyran-7(5H)-one (3), 1,8-dihydroxy-9,10-methylenedioxy-[1]benzopyrano-[3,2-c][2]-benzopyran-7(5H)-one (4), and 1,8,11-trihydroxy-9,10-methylenedioxy-[1]benzopyrano-[3,2-c][2]-benzopyran-7(5H)-one (5). The structure of irisoid B (2) was established unambiguously by X-ray diffraction study.
authors.affiliation: HEJ Research Institute of Chemistry, University of Karachi, Pakistan. hej@cyber.net.pk
authors.forename: M I
authors.initials: MI
authors.lastname: Choudhary
authors.forename: M
authors.initials: M
authors.lastname: Nur-E-Alam
authors.forename: F
authors.initials: F
authors.lastname: Akhtar
authors.forename: S
authors.initials: S
authors.lastname: Ahmad
authors.forename: I
authors.initials: I
authors.lastname: Baig
authors.forename: P
authors.initials: P
authors.lastname: Ondögnii
authors.forename: P
authors.initials: P
authors.lastname: Gombosurengyin
authors.lastname: Atta-ur-Rahman
mesh_terms: D018360:Crystallography, X-Ray; D027621:Iridaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008986:Mongolia; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*