1(2H)-Phthalazinone, 4-((4-chlorophenyl)methyl)-2-(hexahydro-1-methyl-1H-azepin-4-yl)-, monohydrochloride 4-(p-Chlorobenzyl)-2-(hexahydro-1-methyl-1H-azepin-4-yl)-1(2H)-phthalazinone monohydrochloride 58581-89-8 79307-93-0 A 5610 AZELASTINE HYDROCHLORIDE Astelin Azelastine hydrochloride [USAN:JAN] Azelastine monohydrochloride Azeptin E-0659 Optivar W-2979M