CAS: 79307-93-0 Molecular Formula: C22 H24 Cl N3 O . Cl H Molecular Weight (g/mol): 418.36 Synonym: 1(2H)-Phthalazinone, 4-[(4-chlorophenyl)methyl]-2-(hexahydro-1-methyl-1H-azepin-4-yl)-, hydrochloride (1:1),1(2H)-Phthalazinone, 4-[(4-chlorophenyl)methyl]-2-(hexahydro-1-methyl-1H-azepin-4-yl)-, monohydrochloride (9CI),A 5610,Allergodil,Astelin,Astepro,Azelast,Azelastine hydrochloride,Azeptin,E 0659,Optivar,Rhinolast,W 2979M,Zalastine IUPAC Name: 4-[(4-chlorophenyl)methyl]-2-(1-methylazepan-4-yl)phthalazin-1-one;hydrochloride SMILES: Cl.CN1CCCC(CC1)N2N=C(Cc3ccc(Cl)cc3)c4ccccc4C2=O