Next, react the acetyl ester with hydrazine hydrate in the presence of a suitable acid or base to form the 3,5-dimethylpyrazole.
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ethyl 3-(4-fluorophenyl)-1-methyl-1H-pyrazole-4-carboxylate
3-phenyl-5-phenylazo-1H-pyrazole-4-carboxanilide
Guanidine hydrochloride
THIOUREA
