(R)-3-(2,3-dihydroxypropyl)-5-(2-fluoro-4-iodophenylamino)-8-methylpyrido[2,3-d]pyrimidine-4,7(3h,8h)-dione
5-(4-Amino-2-fluorophenylamino)-8-methylpyrido[2,3-d]pyrimidine-4,7(3h,8h)-dione
3-Benzyl-5-(2-fluoro-4-nitrophenylamino)-8-methylpyrido[2,3-d]pyrimidine-4,7(3h,8h)-dione
3-Benzyl-5-hydroxy-8-methylpyrido[2,3-d]pyrimidine-4,7(3h,8h)-dione