for the following products
1-Ethyloxycarbonyl-5-Boc-3-amino-4,6-dihydro-pyrrolo[3,4-c]pyrazole | 5-Boc-3-amino-4,6-dihydropyrrolo[3,4-c]pyrazole-1-carboxylic acid ethyl ester and Ethyl 5-(tert-butoxycarbonyl)-3-amino-4,6-dihydropyrrolo[3,4-c]pyrazole-1-carboxylate