The semicarbazone was prepared according to the method of Shriner and FUsOn." Successive crystallizations from dilute methanol, dilute ethanol and finally methanol- benzene gave a compound melting at 217-218". And. Calcd. for C~ IH~~ O~ PIT~: C, 70.16; H, 9.25: N, 11.89. Found: C, 70.22; H, 9.50; N, 11.76. The p-nitrophenylhydrazone, prepared according to the method of Shriner and FusonIa was recrystallized from dilute alcohol, and ...