ROBERTE. LUTZAND WILLIAMG. REVELEY
1854
For characterization the aceto compound (0.15 g.) was refluxed in alcohol (10 cc.) and acetic acid (5 drops) with 2,4-dinitrophenylhydrazine (0.2 g.). The product separating in bright yellow crystals (0.24 g.) proved t o be a mixture of stereoisomers present in about equal amounts. Fractional crystallization from alcohol gave orange plates, m. p. 122-124", and yellow needles, m. p. 135-136", of the isomeric 2,4-dinitrophenylhydrazones. Anal. Calcd. for C I ~ H L ~ O ~ C,N48.98; ~: H, 4.79; N, 19.04. Found, plates: C, 48.92; H, 4.73; N, 18.89. I
