1,3,5-triazine-2,4,6-triamine|1,3,5-Triazine-2,4,6-triamine ;;|1,3,5-Triazine-2,4,6-triamine;|Melamine ;'|melamine;|Melamine.|Metformin EP Impurity D ; Melamine ; 1,3,5-Triazine-2,4,6-triamine ;|Metformin EP impurity D;