1. basu, N. K., und sharma, S. N., Quart. J. Pharm. Pharmacol. 20, 41 (1947).
2. Buclow, W. B., und gisvold, O., J. Am. Pharm. Assoc. 33, 270 (1944).
3. fuchs, P. C. A., Oesterr. Botan. Z. 48, 325 (1898).
4. mabry, T. J., The betacyanins, a new class of red-violet pigments, and their phylogenetic significance, Taxonomic Biochemistry and Serology (edited by ch. A. leone), S. 239–254, Ronald Press Comp., New York 1964; The betacyanins and betaxanthins, Comparative Phytoche- mistry (edited by T. swain), S. 231–244, Academic Press, London-New York 1966.
5. mabry, T. J., et al., Phytochemistry 2, 61 (1963).