英文别名2,4-Pteridinediamine,7-methyl-(9CI); Methotrexate Impurity 31; 2,4-Pteridinediamine, 7-methyl-; Methotrexate impurity N1; 7-methylpteridine-2,4-diamine; 7-methyl-2,4-diaminopteridine; 2,4-Diamino-7-methyl-pyrimidino<4.5-d>pyrimidin; 7-methyl-pteridine-2,4-diamine; 7-Methyl-pteridin-2,4-diyldiamin; 2,4-Diamino-7-methylpteridin; 7-Methyl-2,4-pteridinediamine; 7-methyl-pteridine-2,4-diyldiamine; 2,4-diamino-7-methylpteridine 
