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procedure for the production of 4 - substituted 1,2 - diaryl - 3,5 - dioxopyrazolidiner, the corresponding hydroxyalkylmalonsyrelactondiarylhydrazider or its salts.
procedure for the production of 4 - substituted 1,2 - diaryl - 3,5 - dioxopyrazolidiner, the corresponding hydroxyalkylmalonsyrelactondiarylhydrazider or its salts.