CAS: 47491-38-3 Molecular Formula: C21 H22 Cl N3 O Molecular Weight (g/mol): 367.87 Synonym: 1(2H)-Phthalazinone, 4-[(4-chlorophenyl)methyl]-2-(hexahydro-1H-azepin-4-yl)-,4-[(4-Chlorophenyl)methyl]-2-(hexahydro-1H-azepin-4-yl)-1(2H)-phthalazinone,Demethylazelastine,Desmethylazelastine,N-Desmethyl Azelastine,N-Desmethylazelastine IUPAC Name: 2-(azepan-4-yl)-4-[(4-chlorophenyl)methyl]phthalazin-1-one SMILES: Clc1ccc(CC2=NN(C3CCCNCC3)C(=O)c4ccccc24)cc1