1. L. Musajo and G. Rodighiero, Exper.,18, 153, 1962.
2. K. Okahara, Bl. Chem. Soc. Japan,11, 389, 1936; Chem. Zbl. 1, 364, 1937.
3. E. Späth, K. Okahara, and F. Kuffner, Ber.,70, 73, 1937.
4. E. Späth and R. Hillel, Ber.,72, 1577, 1939.
5. S. Fukushi and H. Tanaka, J. Agric. Chem. Soc. Japan,33, no. 5, 376, 1959; RZhKhim Bkh., 24300,1960.