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- Publications
- Influence
The Tetracyclic Erythrina Alkaloids
- M. E. Amer, M. Shamma, A. Freyer
- Biology
- 1 March 1991
A listing of more than 90 tetracyclic erythrina-type alkaloids, originating mainly from Erythrina (Leguminosae) and Cocculus (Menispermaceae) plant species, is supplied, together with appropriate… Expand
THREE NOVEL GLYCODIENOID ALKALOIDS FROM ERYTHRINA LYSISTEMON
- M. E. Amer, S. el-Masry, M. Shamma, A. Freyer
- Biology
- 1991
(+)-N-Formylnornantenine, a new aporphine alkaloid from Cyclea atjehensis
- B. Tantisewie, Tharadol Pharadai, Mataya Pandhuganont, H. Guinaudeau, A. Freyer, M. Shamma
- Chemistry
- 1 May 1989
Mass Spectrometry in Structural and Stereochemical Problems. XXXI.1 Aporphines and Related Alkaloids2
- M. Ohashi, J. Wilson, H. Budzikiewicz, M. Shamma, W. A. Slusarchyk, C. Djerassi
- Chemistry
- 1 September 1963
Five New Alkaloids from Colchicum ritchii
- A. Freyer, M. A. Zarga, S. Firdous, H. Guinaudeau, M. Shamma
- Biology
- 1 July 1987
The Nuclear Magnetic Resonance Spectra of Pentacyclic Triterpenes1,2
- M. Shamma, R. E. Glick, R. Mumma
- Chemistry
- 1 December 1962
Four new crinine-type alkaloids from Sternbergia species
- V. Pabuccuoglu, P. Richomme, T. Goezler, B. Kıvçak, A. Freyer, M. Shamma
- Biology
- 1 July 1989
The crinine-type alkaloids (+)-buphanisine and (−)-siculine have been obtained from Sternbergia sicula, while (−)-epimaritinamine and (−)-maritinamine were found in Sternbergia lutea