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    Isoflavonoid glycosides from the rhizomes of Iris germanica
    (Wiley-V C H Verlag Gmbh, 2003) Atta-ur-Rahman; Nasim, S; Baig, I; Orhan, I; Sener, B; Ayanoglu, F; Choudhary, MI
    Five new di- and triglycosides, irigenin 7-[O-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranoside] (1), 6-hydroxygenistein 4'-[O-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranoside] (2), nigricin 4'-[O-beta-D-glucopyanosyl-(1 -->6)-beta-D-glucopyranoside] (3), nigricin 4'-[O-beta-D-glucopyanosyl-(1-->2)-O-[alpha-L-rhamnopyranosyl-(1-->6)]-beta-D-glucopyranoside] (4), and 7-{4'-[2-O-(4-acetyl-2-methoxyphenyl)-beta-D-glucopyranosyl]oxy}-3'-(beta-D-glucopyranosyloxy)phenyl]-9-methoxy-8H-1,3-dioxolo[4.5-g]-[1 benzopyran-8-one-] (5), along with a known compound, nigricin 4'-(beta-D-glucopyranoside) (6), were isolated from the rhizomes of Iris germanica. The structures of these compounds were established by spectroscopic methods, including 2D NMR spectroscopic techniques.
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    NEW AND KNOWN CONSTITUENTS FROM IRIS UNGUICULARIS AND THEIR ANTIOXIDANT ACTIVITY
    (Pergamon-Elsevier Science Ltd, 2010) Atta-ur-Rahman; Hareem, Sumaira; Choudhary, M. Iqbal; Sener, Bilge; Abbaskhan, Ahmed; Siddiqui, Hina; Anjum, Shazia
    A new compound, 1,3-O-diferuloylsucrose (1), and a synthetically known compound, 5,7-dihydroxy-6-methoxychromone (2), along with several known natural products, irilone (3), 4',5,7-trihydroxy-6-methoxyflavanone (4), tectorigenin (5), kaempferol (6), 4',5,7-trihydroxy-3',8-dimethoxyflavanone (7), 8-methoxyeriodictyol (8), hispidulin (9), and mangiferin (10) were isolated from the rhizomes of Iris unguicularis. Compounds 1, 6, 8 and 10 showed a considerable DPPH radicals scavenging activity. Their structures have been deduced through different spectroscopic techniques. The structure of compound 2 was also confirmed by single-crystal X-ray diffraction techniques as well.
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    Two Isoflavones and bioactivity spectrum of the crude extracts of Iris germanica rhizomes
    (Wiley, 2003) Orhan, I; Nasim, S; Sener, B; Ayanoglu, F; Özgüven, M; Choudhary, MI; Atta-ur-Rahman
    In vitro biological activities including bactericidal, fungicidal and insecticidal activities as well as phytotoxicity and brine shrimp toxicity of the petroleum ether, chloroform and ethyl acetate extracts of Iris germanica L. were determined. The bactericidal activity of the extracts was assayed by the agar well diffusion test. In the fungicidal test, the agar tube dilution method was used. The insecticidal activity was determined by the exposure method. The toxicity of the extracts was evaluated by the phytotoxicity test as well as the brine shrimp toxicity test. The chloroform and ethyl acetate extracts of L germanica rhizomes exhibited bactericidal activity, while the petroleum ether extract did not exhibit any bactericidal, fungicidal and insecticidal activities. It was also inactive in the brine shrimp toxicity test, whereas it showed significant phytotoxicity against the plant Lemna aequinoctialis Welv. Two known isoflavones were isolated from the chloroform extract of the plant. Copyright (C) 2003 John Wiley Sons, Ltd.