英文别名6-Methyl-2,4-pteridinediamine; 2,4-Pteridinediamine,6-methyl-(9CI); 2,4-DiaMino-6-Methyl-pteridine; Pralatrexate Impurity 1; Pralatrexate Impurity SMA-1; Methotrexate Impurity 41; Vecabrutinib Impurity 19; Methotrexate Impurity N2; 2,4-diamino-6-methylpteridine; 6-methyl-pteridine-2,4-diyldiamine; 2,4-Pteridinediamine,6-methyl; 6-Methyl-pteridin-2,4-diyldiamin 
