trans-tert-Butyl 5'-benzyl-3'-oxohexahydro-2'H-spiro[piperidine-4,1'-pyrrolo[3,4-c]pyrrole]-1-carboxylate 5g

trans-tert-Butyl 5'-benzyl-3'-oxohexahydro-2'H-spiro[piperidine-4,1'-pyrrolo[3,4-c]pyrrole]-1-carboxylate 5g