OLYSIO (simeprevir) is an inhibitor of the HCV NS3/4A protease. The chemical name for simeprevir is (2,3a,10,11a,12a,14a)–(cyclopropylsulfonyl)-2-[[2-(4-isopropyl-1,3-thiazol-2-yl)-7-methoxy-8-methyl-4-quinolinyl]oxy]-5-methyl-4,14-dioxo-2,3,3a,4,5,6,7,8,9,11a,12,13,14,14a-tetradecahydrocyclopenta[]cyclopropa[][1,6]diazacyclotetradecine-12a(1)-carboxamide. Its molecular formula is CHNOS and its molecular weight is 749.94. Simeprevir has the following structural formula: Simeprevir drug substance is a white… Continue Reading


The active ingredient in OTEZLA tablets is apremilast. Apremilast is a phosphodiesterase 4 (PDE4) inhibitor. Apremilast is known chemically as N-[2-[(1S)-1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-2,3-dihydro-1,3-dioxo-1H-isoindol-4-yl]acetamide. Its empirical formula is CHNOS and the molecular weight is 460.5. The chemical structure is: OTEZLA tablets are supplied… Continue Reading


Nivolumab is a human monoclonal antibody that blocks the interaction between PD-1 and its ligands, PD-L1 and PD-L2. Nivolumab is an IgG4 kappa immunoglobulin that has a calculated molecular mass of 146 kDa. It is expressed in a recombinant Chinese… Continue Reading


Otrexup contains methotrexate, a folate analog metabolic inhibitor. Chemically, methotrexate is [N-[4-[[(2,4-diamino-6-pteridinyl)methyl]methylamino]benzoyl]-Lglutamic acid. The structural formula is: CHNO M.W.= 454.45 Otrexup contains methotrexate in a sterile, preservative-free, unbuffered solution with a 27 gauge ½ inch needle for a single subcutaneous… Continue Reading


OSPHENA is an estrogen agonist/antagonist. The chemical structure of ospemifene is shown in Figure 1. The chemical designation is Z-2-[4-(4-chloro-1,2-diphenylbut-1-enyl)phenoxy]ethanol, and has the empirical formula CHClO, which corresponds to a molecular weight of 378.9. Ospemifene is a white to off-white… Continue Reading


OCALIVA is a farnesoid X receptor (FXR) agonist. Chemically, obeticholic acid is 3α,7α-dihydroxy-6α-ethyl-5β-cholan-24-oic acid. It is a white to off-white powder. It is soluble in methanol, acetone and ethyl acetate. Its solubility in water is pH dependent. It is slightly… Continue Reading


ORENCIA (abatacept) is a selective T cell costimulation modulator. ORENCIA is a soluble fusion protein that consists of the extracellular domain of human cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) linked to the modified Fc (hinge, CH2, and CH3 domains) portion of… Continue Reading