(2008/06/13)
p. 1225 - 1227
(2007/10/02)diethyl oxaloacetate
phenylhydrazine
acetylenedicarboxylic acid diethyl ester
water
4-hydroxyimino-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid ethyl ester
1-phenyl-3-benzoylaminopyrazol-2-in-5-one
5-acetylamino-2-phenyl-1,2-dihydro-pyrazol-3-one
3-amino-1-phenyl-5-pyrazolone
5-oxo-1-phenyl-2,5-dihydro-1H-pyrazole-3-carboxylic acid