Ethyl 5-(tert-butoxycarbonyl)-3-amino-4,6-dihydropyrrolo[3,4-c]pyrazole-1-carboxylate

3-amino-5-tert-butyloxycarbonyl-1-ethoxycarbonyl-4,6-dihydro-1h-pyrrolo[3,4-c]pyrazole ; 5-tert-butyl 1-ethyl 3-aminopyrrolo[3,4-c]pyrazole-1,5(4h,6h)-dicarboxylate ; ethyl 5-(tert-butoxycarbonyl)-3-amino-4,6-dihydropyrrolo[3,4-c]pyrazole-1-carboxylate ; 3-amino-5-((tert-butoxy)carbonyl)-4,6-dihydropyrrolo[3,4-c]pyrazole-1-carboxylic acid ethyl ester ; 5-boc-3-amino-4,6-dihydropyrrolo[3,4-c]pyrazole-1-carboxylic acid ethyl ester ; 5-tert-butyl 1-ethyl 3-amino-1h,4h,5h,6h-pyrrolo[3,4-c]pyrazole-1,5-dicarboxylate ; 1-ethyloxycarbonyl-5-boc-3-amino-4,6-dihydro-pyrrolo[3,4-c]pyrazole