LTZ51N: Letrozole Monoacid Impurity

4-((4-Cyanophenyl)(1H-1,2,4-triazol-1-yl)methyl)benzoic acid sodium salt ;

C17H12N4O2 (acid) ; Mol. Wt.: 304.3 ;

C17H11N4NaO2 (Na Salt) ; Mol. Wt.: 326.28 ;