Journal of Medical Sciences1682-44741812-5727Asian Network for Scientific Information10.3923/jms.2007.1027.1032Tecoma radicans]]>HashemF.A. 6200776Chemical investigation of the aerial parts of Tecoma radicans, F. bignoniaceae indicates the presence of four coumarins, 2`,3`-epoxide alloimperatorin (8-methoxy furanocoumarin), pabulenone (5-alkoxy-furanocoumarin), pereflorin B and 17-methylbothrioclinin. One chromone was also isolated peucenin-7-methyl ether (7,5 dioxygenated chromone). Biological screening of this fraction showed no antitumoral effects but antioxidant activity. The method of the assay of the free radical is modified to make combination between the stable DPPH radical and its determination by ESR instead of determining it by colourimetric method. When the coumarin fraction and isolated compounds were examined for free radical scavenging activity, using the stable DPPH free radical and recorded by ESR, it was found that the whole coumarin fraction was the most active (89.06% inhibition of DPPH free radical) and the isolated components are 0, 25.9, 8.45, 13.85 and 50%, respectively.]]>Acqua, S.D. and G. Innocenti,2004Chaerophyllum hirsutum, extracts.]]>75592595Bohlmann, F. and C. Zdero,1977Bothriocline laxa.]]>1612611263El-Hossary, G.A., M.M. Fathy, H.A. Kassem, Z.A. Kandil, H.A. Abd El-Latif and G.G. Shehabb,2000Eriobotrya japonica L. growing in Egypt and the effect of the leaves on renal failure.]]>388797Harborne, J.B.,1967Pages: 383Pages: 383Harkar, S., T.K. Razdan and E.S. Waight,1984Angelica officinalis.]]>23419426Hase, T., K. Ohtani, R. Kasai, K. Yamasaki and C. Picheansoon-thont,1995Millingtonia hortensis.]]>40287290Hashem, F.A.,2000Erucaria microcarpa Boiss and Their effect as scavenger for singlet oxygen.]]>415973Heilmann, J., I. Merfort and M. Weiss,199515435438Joseph-Nathan, P., J. Hidalgo and A.D. Bruno,1978Perezia multiflora.]]>17583584Kutney, J.P., R.N. Young and A.K. Verma,1969Thamnosma montana Torr.]]>2318451847Kutney, J.P., A.K. Verma and R.N. Young,1972Thamnosma montana Torr.]]>2850915104Larson, R.A.,198827969978Makhmoor, T.,2003Withania somnifera. International work shop on the development of medicines from plants.]]>2003Mingarro, D., N. Acero, F. Llinares, J. Pozuelo and A. Galande Mera et al.,2003Catalpa bignonioides, Walt. (Bignoniaceae).]]>87163167Murray, R.D.H., J. Mendez and S.A. Brown,19821st Edn.,pp: 21-54pp: 21-54Pletsch, M., S. Piacente, C. Pizza and B. Charlwood,1993Tecoma sambucifolium.]]>34161165Reisch, J., S.A. Khaled, K. Szendrei and I. Novak,1975Peucedanum ostruthium.]]>1418891890Warashina, T., Y. Nagatani and T. Noro,2004Tabebuia impetiginosa.]]>6520032011