... (1) The "Chemical Abstracts" name for this compound is I,l'-[(methyl)- ethanediylidenedinitril oldiguanidine. ... (21) F. Bennett and R. Zingaro, Org. Sun., 36, 23 (1956). (22) h Reference, L. C. Anderson and N. V. Seeger. J. Am.. Chem. SOC., 71, 340 (1949), was cited in ref. 17. ...