3-Amino-5-((tert-butoxy)carbonyl)-4,6-dihydropyrrolo[3,4-c]pyrazole-1-carboxylicacid ethyl ester;3-Amino-5-tert-butyloxycarbonyl-1-ethoxycarbonyl-4,6-dihydro-1H-pyrrolo[3,4-c]pyrazole;Ethyl5-(tert-butoxycarbonyl)-3-amino-4,6-dihydropyrrolo[3,4-c]pyrazole-1-carboxylate
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