5-(tert-Butyl) 3-ethyl 2-(1-((benzyloxy)carbonyl)piperidin-4-yl)-2,6-dihydropyrrolo[3,4-c]pyrazole-3,5(4H)-dicarboxylate 1g

5-(tert-Butyl) 3-ethyl 2-(1-((benzyloxy)carbonyl)piperidin-4-yl)-2,6-dihydropyrrolo[3,4-c]pyrazole-3,5(4H)-dicarboxylate 1g