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Rizatriptan Impurity DiHCl 1-(4-Hydrazinylbenzyl)-1H-1,2,4-triazole -(4-Hydrazinophenyl)methyl-1,2,4-triazole 1-(4-hydrazinophenyl)methyl-1,2,4-triazole 4-[1H-1,2,4-Triazole-1-YlMethyl]PhenylHydrazineHcl 1-(4-Hydrazinobenzyl)-1H-1,2,4-triazole Dihydrochloride Rizatriptan Hydrazone Impurity (Rizatriptan Impurity 1) 1-(4-Hydrazineylbenzyl)-1H-1,2,4-triazole dihydrochloride 1-(4-Hydrazinobenzyl)-1H-1,2,4-triazoleDihydrochloride&gt [4-(1,2,4-triazol-1-ylmethyl)phenyl]hydrazine:dihydrochloride 4-1H-1,2,4-TRIAZOL-1-YLMETHYL]PHENYLHYDRAZINE DIHYDROCHLORIDE 1H-1-[(4-Aminophenyl)Methyl]-[1,2,4]-Triazole dihydrochloride 1-(4-Hydrazinobenzyl)-1<i>H</i>-1,2,4-triazole Dihydrochloride 1H-1-[(4-Aminophenyl)Methyl]-[1,2,4]-Triazole dihydrochlorid... 1-[(4-hydrazinylphenyl)methyl]-1H-1,2,4-Triazole Dihydrochloride 4-(1H-1,2,4-Triazol-l-yl Methyl) Phenylhydrazine Dihydrochloride 4-(1H-1,2,4-triazole-1-yl methyl ) phenyl hydrazine dihydrochloride Rizatriptan Impurity DiHCl (1-(4-Hydrazinophenyl)methyl-1,2,4-triazole DiHCl)