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

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.

NNC 55-0396, Mibefradil derivative, is a highly selective T-type calcium channel blocker; displays IC50 values of 6.8 and > 100 μM for inhibition of Cav3.1 T-type channels and HVA currents respectively in INS-1 cells. IC50 value: 6.8 nMTarget: Cav3.1 T-type channelNNC 55-0396 can be an essential tool in preventing human ovarian cancer cell proliferation as a result of its ability to inhibit the function of T-type Ca2+ channels. It is believed that NNC 55-0396 may functions by dissolving in or passing through the plasma membrane of cells.

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

RO-3 is a potent, CNS-penetrant, and orally active P2X3 and P2X2/3 antagonist with pIC50s of 5.9 and 7.0 for human homomultimeric P2X3 and heteromultimeric P2X2/3 receptors, respectively. RO-3 shows selectivity for P2X3 and P2X2/3 over all other functional homomultimeric P2X receptors (IC50 >10 μM at P2X1,2,4,5,7)[1].

Olodaterol (BI1744) is a long acting β2-adrenoceptor agonist with an EC50 of 1.4±0.08 nM.

Ombrabulin (AVE8062) hydrochloride is a synthetic derivative of CA-4-P, which inhibits growth in a large number of drug-resistant animal tumors and carcinogen-induced tumors.

ON-013100, an antineoplastic drug, acts a mitotic inhibitor that could inhibit Cyclin D1 expression.

ONC212, a fluorinated-ONC201 analogue, is a promising anti-cancer drug and also a selective agonist of GPR132.

ONO-4059 is a highly selective, orally bioavailable BTK inhibitor with a potency (IC50) of 2.2 nM.

ONO-8590580 is a Novel GABAAα5 Negative Allosteric Modulator Enhances Long-Term Potentiation and Improves Cognitive Deficits in Preclinical Models.

RO 46-8443 is the first non-peptide endothelin ETB receptor selective antagonist. RO 46-8443 displays up to 2000-fold selectivity for ETB receptors both in terms of binding inhibitory potency and functional inhibition. The observed parallel rightward shift of concentration-response curves with different antagonist concentrations is consistent with a competitive binding mode. Since R0 46-8443 selectively inhibits ETB receptor mediated responses, it is a valuable tool for clarifying the role of ETB receptors in pathology.

SB-649868 is a potent and selective orally active orexin (OX) 1 and OX2 receptor antagonist (pKi =9.4 and 9.5 at the OX1 and OX2 receptor, respectively).

Optovin is a reversible photoactive TRPA1 activator.

OR59402;NSC 48107 is a bioactive compound.

OSI-906 (Linsitinib) is a selective inhibitor of IGF-1R and IR with IC50 of 35 nM and 75 nM, respectively.

OSI-930 is a potent inhibitor of Kit, KDR and CSF-1R with IC50 of 80 nM, 9 nM and 15 nM, respectively; also potent to Flt-1, c-Raf and Lck and low activity against PDGFRα/β, Flt-3 and Abl.

Otenabant (CP945598) is a recently discovered selective, high affinity, competitive CB1 receptor antagonist with Ki of 0.7 nM.

OTSSP167 is a highly potent MELK inhibitor (IC50 = 0.41 nM) and inhibited the phosphorylation of PSMA1 (proteasome subunit alpha type 1) and DBNL (drebrin-like).

Oxamflatin is a potent inhibitor of histone deacetylases (IC50 = 15.7 nM).

P7C3-A20 is an analogue of P7C3，a proneurogenic, neuroprotective agent.

PA-824 is an anti-tuberculosis drug for tuberculosis with MIC less than 2.8 μM.Phase 2.

PAK4-IN-1 is an inhibitor of p21-activated kinases (PAKs), with IC50 of ≤100 nM in MTT assay.

Palifosfamide is a novel molecule for the treatment of sof tissue sarcoma.

Palosuran (ACT-058362) is a new potent and specific antagonist of the human UT receptor with an IC50 of 3.6±0.2 nM.

Pamapimod（R-1503）is a novel p38 MAP kinase inhibitor.

Pardoprunox hydrochloride is a novel partial dopamine D2 and D3 receptor agonist and serotonin 5-HT1A receptor agonist, D2 (pKi = 8.1) and D3 receptor (pKi = 8.6) partial agonist and 5-HT1A receptor (pKi = 8.5) full agonist.

Parimifasor is an immunomodulator, with anti-inflammatory activity.

Pargyline is an irreversible inhibitor of monoamine oxidase (MAO; Kis = 15 and 1.8 μM for MAO-A and MAO-B, respectively).

Paulownin can highly inhibit the growth of H. pylori and exhibits strong inhibitory specificity against H. pylori related to E. coli.