1. M.Suiko and K.Maekawa,Agric. Biol. Chem., 1977,41, 2047.
2. M.Suiko, E.Taniguchi, K.Maekawa, and M.Eto,Agric. Biol. Chem., 1979,43, 741.
3. M.Suiko, E.Taniguchi, K.Maekawa, and M.Eto,Agric. Biol. Chem., 1979,43, 747.
4. M.Suiko, S.Hayashida, and S.Nakatsu,Agric. Biol. Chem., 1982,46, 2691.
5. US Pat. 4742063,Ref. Zhurn. Khimiya., 1989, 1.0.401 II.