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.

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

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.

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..

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

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

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

KAR-5585 (Rodatristat) is the prodrug of the potent TPH1 inhibitor KAR5417, shows robust reduction of intestinal serotonin (5-HT) levels in mice.

Karonudib (TH1579) is an analogue of TH588, a potent, selective MTH1 inhibitor with good oral availability and demonstrates excellent pharmacokinetic and anti-cancer properties in vivo..

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.

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.

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).

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

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

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.

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

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.

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

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..

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

KDM5-C70 is the cell-permeable derivative of KDM5-C49, potent, selective and cell permeable KDM5 inhibitor with IC50 of 0.3, 0.3 and 0.58 uM for KDM5A, B and C, respectively.

KDM5-IN-1 is a potent, selective and orally bioavailable KDM5 inhibitor with an IC50 of 15.1 nM.