Itano
Yakugaku Zasshi, 1955 , vol. 75, p. 441,443
Chem.Abstr., 1956 , p. 2552
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Crippa; Guarneri
Farmaco, Edizione Scientifica, 1955 , vol. 10, p. 691,695
1: 4-hydrazinobenzenesulphonamide With trifluoroacetic acid in isopropyl alcohol T=40°C; 2: 1,1,1-trifluoro-4-(4`-methylphenyl)-2,4-butanedione in isopropyl alcohol T=40°C;