Quinidine is an antimalarial schizonticide and an antiarrhythmic agent with class 1a activity; it is the d–isomer of quinine and its molecular weight is 324.43. Quinidine gluconate (quinidine gluconate (quinidine gluconate injection) injection) is the gluconate salt of quinidine; its chemical name is cinchonan–9–ol, 6'– methoxy–, (9S)–, mono–D–gluconate; its structural formula is

QUESTRAN® (Cholestyramine for Oral Suspension USP), the chloride salt of a basic anion exchange resin, a cholesterol lowering agent, is intended for oral administration. Cholestyramine resin is quite hydrophilic, but insoluble in water. The cholestyramine resin in QUESTRAN (cholestyramine) is not absorbed from the digestive tract. Four grams of anhydrous cholestyra-mine resin is contained in 9 grams of QUESTRAN powder. Four grams of anhydrous cholestyramine resin is contained in 5 grams of QUESTRAN (cholestyramine) LIGHT. It is represented by the following structural formula:

Quinidine is an antimalarial schizonticide and an antiarrhythmic agent with Class la activity; it is the d-isomer of quinine, and its molecular weight is 324.43. Quinidine sulfate (quinidine sulfate (quinidine sulfate (quinidine sulfate tablet, film coated, extended release) tablet, film coated, extended release) tablet, film coated, extended release) is the sulfate salt of quinidine; its chemical name is cinchonan-9-ol, 6'-methoxy-, (9S)-, sulfate (2:1) (salt) dihydrate; its molecular weight is 782.94, of which 82.9% is quinidine base; and it has the following structural formula:

DORAL® (brand of quazepam) Tablets contain quazepam, a trifluoroethyl benzodiazepine hypnotic agent, having the chemical name 7-chloro-5- (o-fluoro-phenyl)-1,3-dihydro-1-(2,2,2-trifluoroethyl)-2H?­1,4-benzodiazepine-2-thione and the following structural formula:

SEROQUEL® (quetiapine fumarate) is a psychotropic agent belonging to a chemical class, the dibenzothiazepine derivatives. The chemical designation is 2-[2-(4-dibenzo [b,f] [1,4]thiazepin-11-yl-1piperazinyl)ethoxy]-ethanol fumarate (2:1) (salt). It is present in tablets as the fumarate salt. All doses and tablet strengths are expressed as milligrams of base, not as fumarate salt. Its molecular formula is C₄₂H₅₀N₆O₄S₂•C₄H₄O₄ and it has a molecular weight of 883.11 (fumarate salt). The structural formula is:

Quinidine is an antimalarial schizonticide and an antiarrhythmic agent with Class la activity; it is the d-isomer of quinine, and its molecular weight is 324.43. Quinidine sulfate is the sulfate salt of quinidine; its chemical name is cinchonan-9-ol, 6'-methoxy-, (9S)-, sulfate(2:1) dihydrate.

QUALAQUIN (quinine sulfate) is a cinchona alkaloid chemically described as cinchonan-9-ol, 6'-methoxy-, (8?, 9R)-, sulfate (2:1) (salt), dihydrate with a molecular formula of (C₂₀H₂₄N₂O₂)₂•H₂SO₄•2H₂O and a molecular weight of 782.96.

Quinidine is an antimalarial schizonticide and an antiarrhythmic agent with Class Ia activity; it is the d-isomer of quinine, and its molecular weight is 324.43. Quinidine gluconate is the gluconate salt of quinidine; its chemical name is cinchonan-9-ol, 6'-methoxy-, (9S)-, mono-D-gluconate. The structural formula is represented below:

SEROQUEL XR (quetiapine fumarate) is a psychotropic agent belonging to a chemical class, the dibenzothiazepine derivatives. The chemical designation is 2-[2-(4-dibenzo [b,f] [1,4]thiazepin-11-yl-1piperazinyl)ethoxy]-ethanol fumarate (2:1) (salt). It is present in tablets as the fumarate salt. All doses and tablet strengths are expressed as milligrams of base, not as fumarate salt. Its molecular formula is C₄₂H₅₀N₆O₄S₂•C₄H₄O₄ and it has a molecular weight of 883.11 (fumarate salt). The structural formula is: