G. Pellizzari, Orosi17, 143, 185 (1893).
K. A. Hoffman andO. Ehrhart, Ber. dt. Chem. Ges.45, 2731 (1912).
W. F. C. Dresler andR. Stein, Annlr Chem.150, 242 (1869).
R. W. Brockman, S. Shaddix, W. R. Laster Jr. andF. M. Schabel Jr., Cancer Res.30, 2358 (1970).
Deaza analogs of III, 3-hydroxyhydantoins and derivatives of 1,2,4-triazolon-5, have recently appeared in literature. Cf.P. Fankhauser andM. Brenner, Helv. chim. Acta53, 2298 (1970). —G. Zinner, Arch. Pharmazie301, 827 (1968).