英文别名1,3-Dihydro-1-oxoisobenzofuran-6-carbonitrile; 3-oxo-1,3-dihydro-2-benzofuran-5-carbonitrile; 3-Oxo-1,3-dihydroisobenzofuran-5-carbonitrile; Chlortalidone Impurity 18; Chlortalidone Impurity 8; 3-oxo-1H-2-benzofuran-5-carbonitrile; 5-Isobenzofurancarbonitrile, 1,3-dihydro-3-oxo- 
