Safiev, O.G.; Nazarov, D.V.; Zorin, V.V.; Rakhmankulov, D.L. Journal of Organic Chemistry USSR (English Translation), 1988 , vol. 24, p. 1614 - 1615 Zhurnal Organicheskoi Khimii, 1988 , vol. 24, # 8 p. 1790 - 1791