De Waal, H.L.Du Toit, P.J.2016-07-112016-07-1120161939De Waal, HL 1939, 'The Senecio alkaloids Part I : the isolation of isatidine from Senecio retrorsus and Senecio isatideus', Onderstepoort journal of Veterinary Science and Animal Industry, vol. 12, no. 1, pp. 155-1630330-2456http://hdl.handle.net/2263/54976The articles have been scanned in colour with a HP scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to final presentation PDF-Format.Includes bibliographical referencesIsatidine has been isolated not only from S. isatideus D.C. but also from S. retrorsus D.C., not hitherto observed by other workers. S. retrorsus contains as its main alkaloid retrorsine, accompanied by isatidine in lesser quantities. S. isatideus contains as its main alkaloid isatidine, accompanied by very small quantities of retrorsine. The chemical properties of isatidine and isatinecic acid are described, as well as the hydrolysis of isatidine to isatinecic acid and the oxidation of isatidine to oxalic acid. The pharmacology, pathology and further structural results with isatidine will be reported9 pages : illustrationsen©ARC-Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). ©University of Pretoria. Department of Library Services (digital).IsatidineSenecio alkaloidsPoisonous plantsVeterinary medicine -- South AfricaArticle