英文别名1-(diaminomethylidene)-2-methylguanidine; monomethylbiguanide; methylbiguanidine; Biguanide,1-methyl; Imidodicarbonimidic diamide,N-methyl; 1-methyl-biguanide; methylbiguanide; Metformin Impurity 5; Metformin hydrochloride impurity E; Metformin EP impurity E; N-Methylimidodicarbonimidic diamide; N-Methyl-N'-guanylguanidine 
