Rigosertib (ON-01910) is a non-ATP-competitive inhibitor of PLK1 with IC50 of 9 nM; shows 30-fold greater selectivity against PLK2 and no activity to PLK3.

RI-2 is an optimized RAD51 inhibitor with an IC50 of 44.17 μM in the standard DNA binding assay; specifically inhibits HR(Homologous recombination) repair in human cells.

RGX-104 is an orally bioavailable agonist of the nuclear receptor liver X receptor beta (LXRbeta; NR1H2; LXR-b), with potential immunomodulating and antineoplastic activities.

RGFP966 is specific inhibitor of HDAC3, with an IC50 of 0.08 μM and no effective inhibition of any other HDAC at concentrations up to 15 μM.

RGB-286638 is a novel CDK inhibitor with IC50s of 1 nM/2 nM/3 nM/4 nM/5 nM for cyclin T1-CDK9/cyclin B1-CDK1/cyclin E-CDK2/cyclin D1-CDK4/cyclin E-CDK3/p35-CDK5 respectively; less potent against cyclin H-CDK7 and cyclin D3-CDK6.

RG7090(CTEP Derivative,Basimglurant, RO4917523) is a negative modulator of metabotropic glutamate receptor subtype 5 (mGluR5; GRM5).

RG108 is an inhibitor of DNA methyltransferase with IC50 of 115 nM, does not cause trapping of covalent enzymes.

Reversine, a small synthetic purine analogue (2,6-disubstituted purine), is a potent inhibitior of Aurora A/B/C with IC50s of 150-500 nM.

Retigabine is a novel anti-convulsant, enhances activation of KCNQ2/Q3 potassium channels.

RepSox(E-616452; SJN 2511) is a potent and selective inhibitor of the TGFβR-1/ALK5 with IC50 of 23 nM and 4 nM for ATP binding to ALK5 and ALK5 autophosphorylation, respectively.

Remodelin is an inhibitor of acetyl-transferase NAT10.

Remodelin is an inhibitor of acetyl-transferase NAT10.

Remdesivir is a novel RNA-dependent RNA Polymerase,(RdRp) inhibitor. The purity of remdesivir>99.8%,signal impurity<0.05%.

Relebactam is a diazabicyclooctane inhibitor with activity against a wide spectrum of β-lactamases, including class A (extended-spectrum β-lactamases [ESBLs] and KPC) and class C (AmpC) enzymes.

Regorafenib (BAY 73-4506, Fluoro-Sorafenib) is a multi-target inhibitor for VEGFR1, VEGFR2, VEGFR3, PDGFRβ, Kit, RET and Raf-1 with IC50 of 13 nM/4.2 nM/46 nM, 22 nM, 7 nM, 1.5 nM and 2.5 nM, respectively.

Regorafenib (BAY 73-4506) is a multi-target inhibitor for VEGFR1, VEGFR2, VEGFR3, PDGFRβ, Kit, RET and Raf-1 with IC50 of 13 nM/4.2 nM/46 nM, 22 nM, 7 nM, 1.5 nM and 2.5 nM, respectively.

Rebaudioside C(Dulcoside B) is used as natural sweeteners to diabetics and others on carbohydrate-controlled diets.

Rbin-1 is a potent, reversible, and specific chemical inhibitor of eukaryotic ribosome biogenesis. Rbin-1 inhibits the ATPase with GI50 of 136±7 nM.

RBC8 is a novel small molecule inhibitor of Ral GTPase; has IC50 of 3.5 μM in H2122 cell and 3.4 μM in H358 cell.

Ravidasvir(PPI-668) is a NS5A Inhibitor.

Raphin1 is an orally available selective phosphatase inhibitor improves proteostasis and diminishes deficits in a mouse model of Huntington’s disease.

Rapamycin (Sirolimus, AY-22989, WY-090217) is a specific mTOR inhibitor with IC50 of ~0.1 nM. -

Ranolazine (Ranexa)

Raltitrexed(ZD1694), an inhibitor of thymidylate synthase, is an antimetabolite drug used in cancer chemotherapy.

Raltegravir Salt is a potent human immunodeficiency virus (HIV) integrase inhibitor and a novel anti-AIDS drug.

Ralinepag is a potent, orally bioavailable and non-prostanoid prostacyclin (IP) receptor agonist, with EC50s of 8.5 nM, 530 nM and 850 nM for human and rat IP receptor and human DP1 receptor, respectively.

RAF709 is a novel Raf kinase inhibitor extracted from patent WO2014151616A1, compound example 131, has an IC50 of 0.5 and 1.8 nM for c-Raf and b-Raf, respectively.

RAF265 (CHIR-265) is a highly selective B-Raf and VEGFR2 inhibitor with IC50 of 3-60 nM and EC50 of 30 nM, including B-Raf, C-Raf and mutant B-Raf.

Radotinib(IY-5511) is a novel and selective BCR-ABL1 tyrosine kinase inhibitor with IC50 of 34 nM for wild-type BCR-ABL1 kinase.

Rac BHFF is a potent and selective GABAB receptor positive allosteric modulator that increases the efficacy and potency of GABA ( > 149% and > 15-fold respectively). Orally active and exhibits anxiolytic activity in vivo.