Flumazenil impurity B - ethyl 8-hydroxy-5-methyl-6-oxo-5,6-dihydro-4H-imidazo [1,5-a][1,4]benzodiazepine-3-carboxylate

Thiamazole

Spirapril for system suitability

Tiamulin hydrogen fumarate

Azelastine impurity E - 3-(4-chlorobenzilidene)isobenzofuran-1(3H)-one

Naftidrofuryl impurity F - 2-[(diethylamino)ethyl 2-[(naphthalen-2-yl)methyl]-3- (tetrahydrofuran-2-yl)propanoate

Azelastine impurity B - 1-benzoyl-2-[(4RS)-1-methylhexahydro-1H-azepin-4-yl]diazane

Azelastine impurity D - 4-(4-chlorobenzyl)phthalazin-1(2H)-one

Tilidine hydrochloride hemihydrate - Reference Spectrum

Azelastine hydrochloride