A potent antagonist of the type III receptor tyrosine kinases PDGFRβ, FLT3, and c-Kit (IC₅₀ = 200, 220, and 170 nM, respectively); less potently inhibits CSF-1R (IC₅₀ = 3.4 µM) and does not significantly inhibit other tyrosine or serine/threonine kinases.

2-O-ethyl PAF C-16 is a synthetic PAF analog which contains an ethyl group, attached by an ether linkage, at the sn-2 position. It is a less potent agonist than methylcarbamyl PAF C-16 in the induction of platelet aggregation in both human and rabbit PRP. 2-O-ethyl PAF C-16 causes aggregation of…

A heptose that inhibits glucokinases and hexokinases from diverse organisms through competition with D-glucose (Ki = 0.25 mM); blocks glucose oxidation and glucose-mediated insulin release from pancreatic islet cells.

An intermediate in several metabolic pathways, including glycolysis and gluconeogenesis.

A specific inhibitor of class I α-1,2-mannosidase (IC₅₀ = 20 mM), a key enzyme for N-glycan processing in the endoplasmic reticulum and Golgi; inhibiting α-1,2-mannosidase with 1-Deoxymannojirimycin generates N-linked oligosaccharides with high mannose content, preventing…

An activator of PLC that stimulates superoxide generation, increase in cytoplasmic calcium, and inositol phosphate formation in human neutrophils when used at a concentration of 15-50 µM; promotes the hydrolysis of phosphatidylinositol bisphosphate by all PLC isoforms.

A major component of the root of P. suffruiticosa that at 30 µM inhibits the growth of human hepatocellular carcinoma SK-HEP-1 cells by causing cell cycle arrest and suppressing the activation of NF-κB.

A selective IDO1 inhibitor (IC₅₀ = 7.1 nM in HeLa cells); promotes T and natural killer-cell growth, increases IFN-γ production, and reduces conversion to Treg-like cells in a coculture system of human allogeneic lymphocytes with either dendritic cells or tumor cells; inhibits…

A natural, potent and irreversible inhibitor of cysteine proteases; IC50 values for inhibiting cathepsins K, S, and L, in vitro, are 1.4, 4.1, and 2.5 nM, respectively; also inhibits papain, calpain, and cathepsins B and H.

A triazolothiadiazine that inhibits PDE4 (EC₅₀ = 18.7 nM in a cell-based assay); selectively inhibits PDE4A (IC₅₀ = 6.7 nM) over PDE4B1, PDE4B2, PDE4C1, and PDE4D2 (IC₅₀ = 48.2, 37.2, 452, and 49.2 nM, respectively).

An FGFR inhibitor.

A potent, selective, brain permeable inhibitor of GSK3α and GSK3β (Kis = 6.9 and 31 nM, respectively); shows good bioavailability after oral administration in vivo, inhibiting hippocampal tau phosphorylation and reversing cognitive deficits induced by the NMDA receptor antagonist MK-801.

ML-204 selectively blocks transient receptor potential canonical 4 (TRPC4) channels (IC₅₀s = 0.96 and 2.6 μM in fluorescent and electrophysiological assays, respectively). It exhibits 19-fold selectivity against TRPC6 and 9-fold selectivity against TRPC5 and does not affect TRPV1,…

A flavonoid compound that acts as a powerful antioxidant; inhibits TBARS formation with an IC50 value of 6.34 µM; blocks oxLDL uptake by U937-derived macrophages at 20 µM; demonstrates potent chemopreventative potential by binding JAK1/STAT3 to inhibit neoplastic transformation of…

A non-protein amino acid that chelates iron and copper; inhibits certain enzymes that contain iron or copper, including arginase (IC₅₀ = 3.7 µM).

A cell-permeable inhibitor of SCF-mediated c-kit activation, completely blocking phosphorylation of c-kit in human melanoma cells at a concentration between 1 and 5 µM; prevents SCF-mediated downstream phosphorylation of p44/p42 ERK.

A selective allosteric inhibitor of Bcr-Abl (IC₅₀s = 4.52, 0.38, and 0.93 µM against Bcr-Abl mutants G250E, E255V, and M351T, respectively); displays additive inhibitory activity against T315I Bcr-Abl mutants both in in vitro assays and in a recalcitrant T315I Bcr-Abl mutant mouse…

A selective inhibitor of the β5i (LMP7) subunit of the immunoproteasome (IC₅₀s = 65 and 73 nM for mouse and human, respectively) that demonstrates significantly weaker activity at the β5 subunit of the constitutive proteasome (IC₅₀s = 0.92 and 1.04 µM for mouse…

A MS-cleavable crosslinking reagent (18Å in length) that contains two intrinsic positive charges, which allow cross-linked peptides to fragment into their component peptides by collision-induced dissociation or in-source decay.

A lipoic acid analog that inhibits α-ketoglutarate dehydrogenase, particularly in tumor cells; induces a strong mitochondrial burst of reactive oxygen species at 60-240 µM, resulting in cell death; demonstrates both in vitro and in vivo anti-tumor activity.

8-hydroxy Guanine is produced by oxidative damage of DNA or RNA by reactive oxygen and nitrogen species, including hydroxyl radical and peroxynitrite. It serves as a measure of oxidative stress in biological systems.

A potent and selective inhibitor of reticulocyte 15-LO-1.

A potent blocker of HCN channels that inhibits HCN4 more potently than HCN1 (IC₅₀s = 32 and 158 nM, respectively); modulates the sinoatrial node and slows heart rate; reduces neuropathic pain in several animal models.

A selective GPR55 inverse agonist that antagonizes GPR55 constitutive activity (IC₅₀ = 15 μM); blocks GPR55-mediated endothelial wound healing and reverses LPI-inhibited platelet aggregation.

A selective SIP1 agonist (EC₅₀ = 1.35 nM); activates S1P1-mediated p42/p44 MAPK phosphorylation in CHO-K1 cells transfected with S1P1 (EC₅₀ = 46 nM); induces S1P1-dependent lymphopenia in mice, decreasing B and T cells by 65 and 85%, respectively, at 50 nM.

A Ca2+-selective ionophore for biological membranes that can be used in microelectrodes for the determination of resting Ca2+-activities and of slowly changing Ca2+ levels.

An α-hydroxy acid, overproduced in 2-hydroxyglutaric aciduria; mutations in IDH1 and IDH2 cause these enzymes to convert isocitrate to 2-hydroxyglutarate; competitively inhibits α-ketoglutarate-dependent dioxygenases, including lysine demethylases and DNA hydroxylases.

A cell-penetrating peptide inhibitor of calpain (IC₅₀ = 5 nM) which completely abolishes calpain activity in platelets; also a potent inhibitor of cathepsin K (IC₅₀ = 0.11 nM).

A prenylflavonoid with potent estrogenic activity that inhibits both ERα and ERβ (IC₅₀s = 57 and 68 nM, respectively); effective in vivo, suppressing bone loss and temperature changes in rat models of osteoporosis and postmenopausal hot flashes.

A brain-penetrant inhibitor of CSF1R, as well as c-Kit and FLT3 (IC₅₀s = 20, 10, and 160 nM in vitro, respectively); blocks macrophage recruitment in mammary tumor-bearing mice and blocks glioblastoma invasion in both cell culture and a mouse model of glioblastoma multiforme.

An inhibitor of EGFR and VEGFR tyrosine kinases (IC₅₀s = 2, 6, 77, and 59 nM for EGFR, ErbB2, KDR, and FLT1, respectively); demonstrates antitumor activity and anti-angiogenic activity in numerous in vitro and in vivo models.

A potent and selective inhibitor of PLD1, both in vitro (IC₅₀ = 46 nM) and in cells (IC₅₀ = 11 nM); also effective as a PLD2 inhibitor at higher concentrations (IC₅₀ = 933 nM in vitro; 1,800 nM in cells); strongly inhibits the invasive migration of several breast…