Synonyms: Spiro[pyrrolidine-3,4'(1'H)-pyrrolo[1,2-a]pyrazine]-1',2,3',5(2'H)-tetrone,2'-[(4-bromo-2-fluorophenyl)methyl]-, (-)-;Spiro[pyrrolidine-3,4'(1'H)-pyrrolo[1,2-a]pyrazine]-1',2,3',5(2'H)-tetrone,2'-[(4-bromo-2-fluorophenyl)methyl]-, (3'R)- (9CI);(3R)-2'-(4-Bromo-2-fluorobenzyl)-1',2',3',4'-tetrahydrospiro[pyrrolidine-3,4'-pyrrolo[1,2-a]pyrazine]-1',2,3',5-tetraone;AS 3201; Ranirestat