Results 121 to 130 of about 811 (158)

Antibacterial activity of Alstonia scholaris and Leea tetramera

Fitoterapia, 2003
The crude methanolic extracts of the leaves, stem and root barks of Alstonia scholaris and Leea tetramera on partitioning (petrol, dichloromethane, ethyl acetate, butanol) gave fractions exhibiting improved and broader spectrum of antibacterial activity. Especially the butanol fractions of A. scholaris and the root bark of L. tetramera.
M R, Khan, A D, Omoloso, M, Kihara
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Mechanisms underlying the antihypertensive effect of Alstonia scholaris

Journal of Ethnopharmacology, 2015
Alstonia scholaris has a long history of use in the Ayurveda traditional treatment of various ailments including hypertension. We have reported the blood pressure lowering activity of the extract of A. scholaris. The following research aim to delineate the pharmacological mechanism involve in the antihypertensive action.Vasorelaxant effect of the n ...
Idris, Bello, Nasiba Salisu, Usman, Roziahanim, Mahmud, Mohd Zaini, Asmawi   +3 more
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Indole Alkaloids from the Leaves of Philippine Alstonia scholaris.

ChemInform, 2005
The first seco-uleine alkaloids, manilamine (1) (18-hydroxy-19,20-dehydro-7,21-seco-uleine) and N4-methyl angustilobine B (2), were isolated from the (pH 5) alkaloid extract of Philippine Alstonia scholaris leaves together with the known indole alkaloids 19,20-(E)-vallesamine (3), angustilobine B N4-oxide (4), 20(S)-tubotaiwine (5), and 6,7-seco ...
Allan Patrick G, Macabeo, Karsten, Krohn, Dietmar, Gehle, Roger W, Read, Joseph J, Brophy, Geoffrey A, Cordell, Scott G, Franzblau, Alicia M, Aguinaldo   +7 more
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Indole alkaloids from Alstonia scholaris

Phytochemistry, 1987
Abstract A new indole alkaloid, alstonamine and a sitsirikine type indole alkaloid, rhazimanine, have been isolated from the leaves of Alstonia scholaris .
null Atta-Ur-Rahman, K.A. Alvi
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Scholarine: An indole alkaloid of Alstonia scholaris

Phytochemistry, 1981
Abstract A new alkaloid designated scholarine was isolated from the leaves of Alstonia scholaris . It was (±) 12-methoxyechitamidine as determined by chemical and spectroscopic investigations.
Avijit Banerji, Arup K. Siddhanta
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Scholaricine, an alkaloid from alstonia scholaris

Phytochemistry, 1985
Abstract A new alkaloid, scholaricine, has been isolated to which structure 2 (demethylscholarine) has been assigned.
A. Atta-Ur-Rahman, M. Asif, M. Ghazala, J. Fatima, K.A. Alvi   +4 more
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Evaluation of Alstonia scholaris leaves for broncho-vasodilatory activity

Journal of Ethnopharmacology, 2005
The present study demonstrates that the ethanol extract of Alstonia scholaris (Apocynaceae) leaves induced pronounced bronchodilatory activity in anaesthetized rats with the probable involvement of prostaglandins. However, in vitro preparations of guinea-pig trachea did not confirm this property, indicating that bronchodilation is not due to the direct
Shabana, Channa, Ahsana, Dar, Shakeel, Ahmed, , Atta-ur-Rahman   +3 more
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Hypoglycemic Potential of Triterpenes from Alstonia scholaris

Pharmaceutical Chemistry Journal, 2013
A dichloromethane extract of air-dry leaves of Alstonia scholaris (L.) R. Br. contains a mixture of cycloeucalenol (1a), cycloartanol (1b) and lupeol (1c); lupeol acetate (2); and betulin (3). The structures of these triterpenes were elucidated by extensive 1D and 2D NMR spectroscopy and confirmed by comparison of their 13C NMR data to those reported ...
Consolacion Y. Ragasa, Kosta Fremmielle Lim, Chien-Chang Shen, Dennis D. Raga   +3 more
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[Flavonoids in leaves of Alstonia scholaris].

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2009
To investigate the flavonoids in leaves of Alstonia scholaris, an ethno-remedy of Dai People in Yunnan.The chemical constituents were isolated and purified by column chromatography. Their structures were elucidated on the basis of spectroscopic evidences and physicochemical properties.Eight flavonoids were isolated and identified as kaempferol (1 ...
Tingting, Hui, Yun, Sun, Liping, Zhu, Wen, Guo, Gaoxiong, Rao   +4 more
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ChemInform Abstract: Phytochemical Studies on Alstonia scholaris.

ChemInform, 2010
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Nighat Sultana, Muhammad Saleem
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