1. G. A. Iacobucci, Cienc. Invest.7, 48 (1951); Chem. Abstr.45, 7129 (1951).
2. S. Yu Yunusov andN. N. Progressov, Zh. obshch. Khim.20, 1151 (1950); Chem. Abstr.45, 1608 (1951).
3. K. G. Pulatova, S. K. Maekh, Z. F. Ismailov andS. Yu Yunusov, Khim. Prir. Soedin4(6), 394 (1968); Chem. Abstr.70, 88033 (1969).
4. M. Shamma andB. S. Dudock, J. pharm. Sci.57, 262 (1968).
5. A. M. Kuck, personal communication (1968).