Kelatorphan is a full inhibitor of enkephalin degrading enzymes.

KDU731 is a potent, selective parasite Cryptosporidium lipid kinase PI4K (phosphatidylinositol-4-OH kinase) inhibitor with IC50 of 25 nM, displays >50-fold selectivity window against the human PI4K IIIβ homologue.

KDS2010 (KDS-2010, KDS 2010) is a potent, highly selective, reversible Monoamine oxidase-B (MAO-B) inhibitor with IC50 of 7.6 nM.

KDM-IN-6 is a potent, highly selective and cell-active inhibitor of KDM2A/7A with IC50 of 0.16 and 0.19 uM,respectively.

KDM5-C49 is a potent, selective KDM5 inhibitor with IC50 of 25, 30 and 59 nM for KDM5A, B and C, respectively.

KDM5A covalent inhibitor N73 is the the isopropyl ester derivative of N71, an irreversible KDM5A inhibitor (IC50=0.22 uM) that covalently interacts with Cys481, >20-fold selectivity over KDM4A..

KDM5A covalent inhibitor N71 is an irreversible KDM5A inhibitor (IC50=0.22 uM) that covalently interacts with Cys481, >20-fold selectivity over KDM4A..

KCN1 (HIF inhibitor KCN1) is a small molecule inhibitor of the HIF-1 pathway, antagonizes HIF transcription in bioassay, blocks the p300/HIF-1α interaction, and exert potent anticancer activity in vitro and in vivo.

KCL-440 is a a new poly(ADP-ribose) polymerase- PARP inhibitor.

KCI807 (KCI-807) is a lead molecule that selectively disrupts ELK1-dependent promoter activation by wild-type and variant Ars (IC50=0.53 uM) without interfering with ELK1 activation by ERK.

KC01 is a potent and selective inhibitor of ABHD16A with IC50 of 90 nM for hABHD16A, 520 nM for mABHD16A.

KBP-5074 (KBP5074) is a novel non-steroidal, highly selective mineralocorticoid receptor antagonist for the treatment of hypertensive chronic kidney disease..

KBFM123 (KBFM-123) is a small molecule, allosteric inhibitor of GTP-bound form of H-Ras, weakly inhibits the association of H-RasG12V-GppNHp with c-Raf-1 RBD (Kd=10-100 uM).

KB-141 (KB141) is a potent, selective thyroid hormone receptor TRβ agonist (IC50=1.1 nM), binds to hTRβ with a 14-fold higher affinity than to hTRα.

KB SRC 4 (c-Src-IN-4) is a potent, highly selective c-Src kinase inhibitor with Ki of 44 nM, does not inhibit c-Abl up to 125 uM, and binds to c-Src-TM (Q275G, C277Q, F278Y) with similar potency to that of wild-type c-Src.

KAR-5417 is a potent, selective TPH1 (tryptophan hydroxylase-1) inhibitor with IC50 of 33 nM.

Kanamycin sulfate(Kanamycin monosulfate) is an aminoglycoside antibiotic, available in oral, intravenous, and intramuscular forms, and used to treat a wide variety of infections.

KAN0438757 (KAN-0438757) is a potent, selective PFKFB3 inhibitor, the ester prodrug of KAN0438241 with enhanced cell permeability.

KAN0438241 (KAN-0438241) is a potent, selective PFKFB3 inhibitor with IC50 of 0.19 uM, 20-fold selectivity over PFKFB4 and no significant inhibition on PFKFB1 and 2..

Kaitocephalin (PF 1191) is a non-selective ionotropic glutamate receptor (iGluR) antagonist, the first discovered natural toxin with protective properties against excitotoxic-death of cultured neurons induced by NMDA or AMPA/kainate receptors.

K-8986 maleate (K8986) is a histamine H1-receptor antagonist with potential therapeutic for treatment of allergic conjunctivitis..

K-777 is a potent and selective CCR4 antagonist that inhibits both CCL17 binding and CCL17-induced chemotaxis in Hut78 cells with IC50 of 57 and 8.9 nM respectively.

K67 is a specific inhibitor of the interaction between S349-phosphorylated p62 and Keap1, exhibts no inhibitory effect on the interaction of full-length Keap1 with Nrf2-ETGE or full-length Nrf2.

K00546 is a potent inhibitor of the CDC2-like kinase CLK1 and CLK3 with IC50 of 8.9 and 29.2 nM, respectively..

JYL-1421 (SC-0030) is a potent, competitive TRPV1 receptor antagonist with Ki of 53.5 nM, antagonizes capsaicin-induced calcium uptake with EC50 of 9.2 nM.

JW-7-25-1 is a potent MELK inhibitor with biochemical IC50 of 5.0 nM, also inhibits PIK3CA, mTOR, GSK3A and CDK7 with CI50 of 5-60 nM.

JW 642 (JW642) is a potent, selective monoacylglycerol lipase (MAGL) inhibitor with IC50 of 7.6, 14 and 3.7 nM for mouse, rat and human MAGL, respectively.

JVW-1034 is a selective small molecule modulator of σ2R/Tmem97 with Ki of 23 nM, 10-fold weaker affinity for σ1R (Ki=248 nM).

Juniferdin is a small molecule, potent Protein disulfide isomerase (PDI) inhibitor with IC50 of 156 nM, inhibits PDI-mediated reduction of HIV-1 envelope glycoprotein gp120.

JTV-519 (K201) is a Ca2+-dependent blocker of SERCA and a partial agonist of ryanodine receptors (RyRs).