3-[(4-Chlorophenyl)methylene]-1(3H)-isobenzofuranone; 3-(p-Chlorobenzylidene)phthalide; Azelastine EP Impurity E ; Azelastine USP Related Compound E; 3-(4-Chlorobenzal)phthalide
3-[(4-Chlorophenyl)methylene]-1(3H)-isobenzofuranone; 3-(p-Chlorobenzylidene)phthalide; Azelastine EP Impurity E ; Azelastine USP Related Compound E; 3-(4-Chlorobenzal)phthalide