CORRECTION

[1] Conrad M, 1906, BER DTSCH CHEM GES, V39, P2282, DOI 10.1002/cber.190603902204

[2] SYNTHETIC AND SPECTROMETRIC STUDIES OF SOME PYRAZOLONES [J]. CANADIAN JOURNAL OF RESEARCH SECTION B-CHEMICAL SCIENCES, 1949, 27 (04): : 190 - 204

[3] Investigation of pyrazole compounds. I. The reaction product of phenylhydrazine and ethyl cyanoacetate [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1942, 64 : 2133 - 2136

[1] Conrad M, 1906, BER DTSCH CHEM GES, V39, P2282, DOI 10.1002/cber.190603902204

[2] SYNTHETIC AND SPECTROMETRIC STUDIES OF SOME PYRAZOLONES [J]. CANADIAN JOURNAL OF RESEARCH SECTION B-CHEMICAL SCIENCES, 1949, 27 (04): : 190 - 204

[3] Investigation of pyrazole compounds. I. The reaction product of phenylhydrazine and ethyl cyanoacetate [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1942, 64 : 2133 - 2136