1 D2J 6-{3-[(2,4-diamino-5-methylpyrido[2,3-D]pyrimidin-6-yl)methyl]-4-methoxyphenoxy}hexanoic acid 1.000 2 D2N Ethyl 6-{3-[(2,4-diamino-5-methylpyrido[2,3-D]pyrimidin-6-yl)methyl]-4-methoxyphenoxy}hexanoate 0.882 3 MXA 6-(2,5-dimethoxy-benzyl)-5-methyl-pyrido[2,3-D]pyrimidine-2,4-diamine 0.774 4 D2K Ethyl 4-{3-[(2,4-diamino-5-methylpyrido[2,3-D]pyrimidin-6-yl)methyl]-4-methoxyphenoxy}butanoate 0.771