155683-53-7 2-((4-Bromo-2-fluorophenyl)methyl)-6-fluorospiro(isoquinoline-4(1H),3'-pyrrolidine)-1,2',3,5'(2H)-tetrone Bffipt Spiro(isoquinoline-4(1H),3'-pyrrolidine)-1,2',3,5'(2H)-tetrone, 2-((4-Bromo-2-fluorophenyl)methyl)-6-fluoro-