... REFERENCES AND NOTES [I] HR Pfaendler and F. Weisner, Heterocycles, 40, 717 (1995). [2] M. Israel, L. С Jones and EJ Modest, J. Heterocyclic Chem., 4. 659 (1967). [3] M. Israel, SK Tinter, DH Trites and EJ Modest, J. Heterocyclic Chem., 7, 1029 (1970). ...