De Waal, H.L.; Du Toit, P.J.
(Pretoria : Government Printer, 1939)
Isatidine 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 ...