Candesartan N1-Ethyl Impurity 

Chemical Name: 2-Ethoxy-1-[[2'-(1-ethyl-1H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]-1H-benzimidazole-7-carboxylic acid ;

Synonym: N1-Ethyl Candesartan (Acid) ;