1 33M N~6~-methyl-N~6~-(naphthalen-1-yl)pyrido[2,3-D]pyrimidine-2,4,6-triamine 1.000 2 IXG N~6~-methyl-N~6~-phenylpyrido[2,3-D]pyrimidine-2,4,6-triamine 0.833 3 IXE N~6~-methyl-N~6~-(3,4,5-trifluorophenyl)pyrido[2,3-D]pyrimidine-2,4,6-triamine 0.741 4 IXF N~6~-methyl-N~6~-[4-(propan-2-yl)phenyl]pyrido[2,3-D]pyrimidine-2,4,6-triamine 0.741