2,4-Diamino-6-(2,5-dimethoxybenzyl)-5-methylpyrido(2,3-d)pyrimidine mono(2-hydroxyethanesulfonate) 79483-69-5 BW 301U isethionate DRG-0037 PIRITREXIM ISETHIONATE Piritrexim isethionate [USAN] Pyrido(2,3-d)pyrimidine-2,4-diamine, 6-((2,5-dimethoxyphenyl)methyl)-5-methyl-, mono(2-hydroxyethanesulfonate)