英文名称:(R)-Azelastine Usp Related Compound F ((R)-Azelastine N-Oxide) (Mixture Of Diastereomers); Azelastine Impurity 9(Mixture Of Diastereomers); Azelastine Impurity 4; (R)-Azelastine N-Oxide (Mixture Of Diastereomers); 1(2H)-Phthalazinone, 4-[(4-Chlorophenyl)Methyl]-2-[(4R)-Hexahydro-1-Methyl-1-Oxido-1H-Azepin-4-Yl]-; (R)-Azelastine N-Oxide (Mixture of DiastereoMers)