(2,4-Diaminopyrimidin-5-yl)(3,4,5-trimethoxyphenyl)methanol; α-Hydroxy Trimethoprim (Impurity); 2,4-Diamino-α-(3,4,5-trimethoxyphenyl)-5-pyrimidinemethanol; 2,4-Diamino-5-(α-hydroxy-3,4,5-trimethoxybenzyl)pyrimidine; Racemic α-(2,4-Diamino-5-pyrimidyl)-3,4,5-trimethoxybenzyl Alcohol,Trimethoprim