letrozole and ribociclib - Generic Medications

KISQALI FEMARA CO-PACK consists of ribociclib 200 mg film-coated tablets co-packaged with letrozole 2.5 mg tablets. Ribociclib KISQALI (ribociclib) is a kinase inhibitor. Ribociclib succinate is a light yellow to yellowish brown crystalline powder. The chemical name of ribociclib succinate is: Butanedioic acid—7-cyclopentyl- N , N -dimethyl-2-{[5-(piperazin-1-yl) pyridin-2-yl]amino}-7 H -pyrrolo[2,3- d ]pyrimidine-6-carboxamide (1/1). The molecular formula for ribociclib succinate is C 23 H 30 N 8 O.C 4 H 6 O 4 and the molecular weight is 552.64 g/mol [Free base: 434.55 g/mol] . The chemical structure of ribociclib is shown below: KISQALI film-coated tablets are supplied for oral use and contain 200 mg of ribociclib free base (equivalent to 254.40 mg ribociclib succinate). The tablets also contain colloidal silicon dioxide, crospovidone, hydroxypropylcellulose, magnesium stearate, and microcrystalline cellulose. The film-coating contains iron oxide black, iron oxide red, lecithin (soya), polyvinyl alcohol (partially hydrolyzed), talc, titanium dioxide, and xanthan gum as inactive ingredients. Letrozole FEMARA (letrozole) is a nonsteroidal aromatase inhibitor (inhibitor of estrogen synthesis). Letrozole is a white to yellowish crystalline powder, practically odorless, freely soluble in dichloromethane, slightly soluble in ethanol, and practically insoluble in water. It has a molecular weight of 285.31 g/mol, empirical formula C 17 H 11 N 5 , and a melting range of 184°C to 185°C. The chemical name of letrozole is 4,4'-(1H-1,2,4-Triazol-1ylmethylene) dibenzonitrile, and its structural formula is FEMARA is available as 2.5 mg tablets for oral administration. Inactive Ingredients: colloidal silicon dioxide, ferric oxide, hydroxypropyl methylcellulose, lactose monohydrate, magnesium stearate, maize starch, microcrystalline cellulose, polyethylene glycol, sodium starch glycolate, talc, and titanium dioxide. ribociclib structure letrozole structure