Synonyms:
1(2h)-phthalazinone, 4-[(4-chlorophenyl)methyl]-2-(hexahydro-1-methyl-1h-azepin-4-yl)-, monohydrochloride, (s)- ; (s)-azelastine hydrochloride 2 ; azelastine impurity ; (s)-azelastine hydrochloride ; (s)-4-[(4-chlorophenyl)methyl]-2-(hexahydro-1-methyl-1h-azepin-4-yl)-1(2h)-phthalazinone hydrochloride