1. Investigation of Pyrazole Compounds. VIII.1 Synthesis and Acylation of Pyrazolones Derived from Hydrazine and Methylhydrazine
Bruce Graham, H. D. Porter, A. Weissberger
J. Am. Chem. Soc.; 1949; 71(3); 983-988.
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http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/1949/71/i03/f-pdf/f_ja01171a061.pdf