NVP-TNKS656(TNKS-656) is a highly potent, selective, and orally active TNKS2 inhibitor with IC50 of 6 nM; > 300 fold selectivity against PARP1 and PARP2.

NVR 3-778 (NVR3-778, NVR 3778) is a small molecule inhibitor of HBV replication that targets the viral core protein, a first-in-class capsid assembly modulator.

NVS-PAK1-1 potently inhibits autophosphorylation of PAK1 (S144) at 0.25 µM in the Su86.86 cell line and MEK S289 phosphorylation with an IC50 = 0.21 in Su86.86 cells in which PAK2 is downregulated.

NYX-2925 is a Novel NMDA Receptor-Specific Spirocyclic-β-Lactam That Modulates Synaptic Plasticity Processes Associated with Learning and Memory.

O304 is a novel AMPK activator.

O4I1-1 is a Oct3/4 inducer. Increases Oct3/4 mRNA levels in HEK293 cells by 2.5- and 4-fold at 10 μM and 20 μM, respectively.

O4I2 is a a new class of small molecules suitable for iPSC generation, showed high activity in enforcing Oct3/4 expression.

OAC1 is a Octamer-binding transcription factor 4 (Oct4)-activating compound; enhances the iPSC reprogramming efficiency and accelerated the reprogramming process.

OAC2 is an Oct4-activating compound which activates expression through the Oct4 gene promoter; enhances reprogramming efficiency by increasing the rate of production of induced pluripotent stem cells (iPSCs) from embryonic fibroblasts; an analog of OAC1.

OAT-2068 is a potent, selective, orally bioavailable inhibitor of mouse chitotriosidase (mCHIT1) with IC50 of 29 nM, 143-fold selectivity over mAMCase.

Obatoclax (GX15-070) is Bcl-2 homology domain-3 (BH3) mimetic, antagonize all antiapoptotic Bcl-2 family proteins (average IC50, 3 umol/L), including Mcl-1 (IC50, 2.9 umol/L) and Bfl-1 (IC50, 5 umol/L).

Obicetrapib is a CETP inhibitor, on the elevation of high-density lipoprotein cholesterol (HDL-C) and reduction of low-density lipoprotein cholesterol (LDL-C), alone and in combination with statin therapy.

OC000459, a Potent, Selective, and Orally Active D Prostanoid Receptor 2 Antagonist.

Ochratoxin A demonstrates nephrotoxicity and teratogenesis in animals, and shows inhibition of bacterial, yeast, and liver FARSL (phenylalanyl-tRNA synthetases) competitive with phenylalanine.

Ochratoxin B(OTB) is a non-chlorinated analog of OTA that has cytotoxic effects on kidney and liver cells in vitro but only minor effects in vivo, due to its rapid metabolism and excretion.

Oclacitinib, also known as PF03394197, is a novel Janus kinase inhibitor with activity against cytokines involved in allergy.

Octreotide acetate, a long-acting synthetic analog of native somatostatin, inhibits growth hormone, glucagon, and insulin more potently.

Odanacatib (MK 0822) is a potent, selective, and neutral inhibitor of human and rabbit cathepsin K with IC50 of 0.2 nM and 1 nM , respectively.

ODM-201 is a potent and full antagonists for human AR (hAR) with IC50 values of 26 nM by transactivation assays in AR-HEK293 cells.

ODM-203 (ODM203) is a potent, selective, dual inhibitor of FGFR and VEGFR tyrosine kinases with approximately equal potency towards recombinant FGFR1, 2, 3 and 4, as well as VEGFR1, 2 and 3 (IC50=5-35 nM).

OF-1 is a potent inhibitor of BRPF1B and BRPF2 bromodomain with Kd of 100 nM and 500 nM, respectively.

OGG1 inhibitor O8 is a potent, selective inhibitor of 8-oxoguanine DNA glycosylase 1 (OGG1) with IC50 of 0.22 uM, displays no significant activity against other DNA Glycosylases (NEIL1, NTH1, Fpg, IC50>50 uM)..