%0 Journal Article %T A comprehensive investigation of variations in melting range and NMR data of 2,4-dinitrophenylhydrazine derivatives %A Tayyari, Sayyed Faramarz %A J. L. Speakman %A M. B. Arnold %A And M. Behforouz %J Perkin Transactions 2 %@ 0300-9580 %D 1998