2'-(tert-Butoxycarbonyl)-3',4'-dihydro-2'H-spiro[cyclobutane-1,1'-pyrrolo[1,2-a]pyrazine]-6'-carboxylic acid 50mg

2'-(tert-Butoxycarbonyl)-3',4'-dihydro-2'H-spiro[cyclobutane-1,1'-pyrrolo[1,2-a]pyrazine]-6'-carboxylic acid 50mg