... Greece and b Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, 166 JO Prague. Czechoslovakia Received April 14, 1989 Accepted August 7, 1989 ... Collect. Czech. Chern. Commun. (Vol. 55) (1990) temp.,oC 37 37 37 37 37 37 25 37 37 37 ...