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  Allopurinol
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  3-Amino-4-pyrazolecarboxamide hemisulfate
4,4-Dimethoxy-2-butanone
 

Intermediates
Product Name:  3-Amino-4-pyrazolecarboxamide hemisulfate
Structural Formula: 
Molecular Formula:  C4H6N4O.0.5H2SO4
Molecular Weight:  175.15
Uses:  Intermediate of allopurinol
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