1 SBI Sorbinil 1.000 2 FID (2s,4s)-2-aminoformyl-6-fluoro-spiro[chroman-4,4'-imidazolidine]-2',5'-dione 0.850 3 FIR (2r,4s)-2-aminoformyl-6-fluoro-spiro[chroman-4,4'-imidazolidine]-2',5'-dione 0.850 4 FIS (2s,4r)-2-aminoformyl-6-fluoro-spiro[chroman-4,4'-imidazolidine]-2',5'-dione 0.850 5 T7B (1'S)-2',3'-dihydrospiro[imidazolidine-4,1'-indene]-2,5-dione 0.778 6 V3F (5s)-5-methyl-5-phenylimidazolidine-2,4-dione 0.722