Kharchenko, V. G.; Chalaya, S. N.; Kulikova, L. K.; Litvinov, O. V. Pharmaceutical Chemistry Journal, 1987 , vol. 21, # 7 p. 500 - 503 Khimiko-Farmatsevticheskii Zhurnal, 1987 , vol. 21, # 7 p. 824 - 826