tert-Butyl 2-(methylsulfonyl)-5,7-dihydrospiro[pyrano[4,3-d]pyrimidine-8,3'-pyrrolidine]-1'-carboxylate 250mg

tert-Butyl 2-(methylsulfonyl)-5,7-dihydrospiro[pyrano[4,3-d]pyrimidine-8,3'-pyrrolidine]-1'-carboxylate 250mg