Bezuglyi, P. A.; Ukrainets, I. V.; Treskach, V. I.; Turov, A. V.; Gladchenko, S. V.; et al. Pharmaceutical Chemistry Journal, 1992 , vol. 26, # 2 p. 138 - 141 Khimiko-Farmatsevticheskii Zhurnal, 1992 , vol. 26, # 2 p. 33 - 35