Yakugaku Zasshi, , vol. 76, p. 333 Chem.Abstr., , p. 13879 Journal of the Indian Chemical Society, , vol. 32, p. 135 Zhurnal Obshchei Khimii, , vol. 27, p. 3097,3103, 1305;engl. Ausg. S. 3138, 3143, 3144