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Note | Special issue | Vol 82, No. 1, 2010, pp.813-824
Published online, 13th April, 2010
DOI: 10.3987/COM-10-S(E)6
New and Known Constituents from Iris unguicularis and Their Antioxidant Activity

_ Atta-ur-Rahman,* Sumaira Hareem, M. Iqbal Choudhary, Bilge Sener, Ahmed Abbaskhan, Hina Siddiqui, Shazia Anjum, Ilkay Orhan, Ilhan Gurbuz, and Filiz Ayanoglu

*International Centre for Chemical Sciences, H. E. J. Research Institute of Chemistry, University of Karachi, Karachi-75270, Pakistan

Abstract

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.