(R)-(-)-2-(4-Bromo-2-fluorobenzyl)-1,2,3,4-tetrahydropyrrolo(1,2-a)pyrazine-4-spiro-3'-pyrrolidine-1,2',3,5'-tetrone 147254-64-6 AS-3201 Ranirestat SX 3201 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)-