英文别名Topiroxostat Impurity 15; Topiroxostat Impurity 9; Topiroxostat Imp.B; 3-(2-cyano-4-pyridyl)-5-(1-oxy-4-pyridyl)-1,2,4-triazole; 4-[5-(1-Hydroxypyridin-4-ylidene)-1,2,4-triazol-3-yl]pyridine-2-carbonitrile; Topirastat Impurity B; 2-Pyridinecarbonitrile, 4-[3-(1-oxido-4-pyridinyl)-1H-1,2,4-triazol-5-yl]-; Topistat impurity 9; Topicast impurity C 
