2,4-Diamino-5-(3-methoxy-4-ethoxybenzyl)pyrimidine 2,4-Pyrimidinediamine, 5-((4-ethoxy-3-methoxyphenyl)methyl)- 5-((4-Ethoxy-3-methoxyphenyl)methyl)-2,4-pyrimidinediamine 85544-41-8