MC-1575 is a potent and selective class IIa HDAC inhibitor with IC50 of 440 nM for maize HD1-A, displays >70-fold selectivity over HD1-B.

MBQ-167 is a dual Rac/Cdc42 inhibitor, with IC50s of 103 nM for Rac 1/2/3 and 78 nM for Cdc42 in MDA-MB-231 cells, respectively.

MB710 is a small-molecule p53 mutant Y220C stabilizer, binds tightly to the Y220C pocket and stabilizes p53-Y220C in vitro..

MARPIN is a novel ATR-Chk1 pathway inhibitor that inhibits hydroxyurea (HU)-induced phosphorylation of Ser345 on Chk1 with IC50 of 7.7 uM.

Maropitant is a neurokinin (NK1) receptor antagonist.

Maropitant citrate (Cerenia) is a selective neurokinin 1 receptor (NK1) antagonist for prevention of vomiting due to motion sickness in dogs..

Marinopyrrole A (Maritoclax) is a selective Mcl-1 antagonist. It binds to Mcl-1, but not Bcl-XL, and targets Mcl-1 for proteasomal degradation. Maritoclax disrupts the interaction between Bim and Mcl-1 with an IC50 of 10.1 μM.

Marimastat is a broad spectrum MMP inhibitor and selective TACE inhibitor

Marbostat-100 is a potent, selective HDAC6 inhibitor with Ki of 0.7 nM, displays >200-fold selectivity over HDAC1-5, and HDAC7-10.

Mapracorat (ZK 245186) is a potent, selective and non-steroid glucocorticoid receptor (GR) agonist with binding Ki of 1.9 nM.

MAP4K4-IN-44 is a potent, moderately selective small molecule MAP4K4 inhibitor with IC50 of 5 nM in LC3K assay, demonstrates favorable in vivo bioavailability in mouse..

MAP4K4-IN-37 is a potent, selective, orally active inhibitor of serine-threonine kinase MAP4K4 with IC50 of 0.4 nM.

Manidipine is a dihydropyridine L- and T-type calcium channel blocker.

Maltohexaose is a natural saccharide, and can be produced from amylose, amylopectin and whole starch.

MALT1 paracaspase inhibitor 3 is a potent, specific, covalent inhibitor of MALT1 paracaspase with Ki of 10 nM, exhibits 10-and 100-fold improved potency in vitro and in vivo compared with Z-VRPR-fmk.

MAL3-101 is a Hsc70 modulator that inhibits Hsp70 ATPase activity, exhibits antiproliferative activity in breast cancer cells SK-BR-3 with IC50 of 27 uM.

MAI-400 (MAI400) is a novel peptide inhibitor of APC-Asef interaction with Kd of 12 nM and IC50 of 0.25 uM.

MAI-150 is a peptidomimetic inhibitor of APC-Asef interaction, blocks colorectal cancer migration..

Macranthoidin B is a major bioactive saponin in rat plasma after oral administration of extraction of saponins from Flos Lonicerae.

MAC173979 is a novel time-dependent inhibitor of p-aminobenzoic acid biosynthesis with IC50 of 30 uM, represents the first PABA biosynthesis inhibitor with activity against Gram-negative bacteria..

MAC168425 is a novel antibacterial inhibitor that interferes with glycine metabolism in E coli..

MAC13772 is a potent inhibitor of BioA with an IC50 of 250 nM, a novel antibacterial inhibitor that selectively inhibits PABA biosynthesis in M tuberculosis..

MAC1 (Monastrol Antagonizing Compound 1) is a small molecule that can rescue spindle bipolarity in cells lacking Eg5 activity.

M-525 is a first-in-class, highly potent, irreversible small-molecule inhibitor of the menin-MLL interaction with binding IC50 of 3.3 nM in FP assays.

M4284 (M-4284) is a high-affinity biphenyl mannoside FimH inhibitor with HAI of 16 nM in hemagglutination assay.

L-α-Hydroxyglutaric acid disodium salt (L-2-Hydroxyglutarate.

LYS228 is a novel potent monobactam that shows potent activity against carbapenem-resistant isolates of Enterobacteriaceae with MIC90 of 2 ug/ml.

LYPLAL1-IN-11 is a potent, selective, covalent inhibitor of lysophospholipase-like 1 (LYPLAL1) with IC50 of 6 nM.

LY-83583 is an inhibitor of soluble guanylate cyclase (sGC) and of cGMP production, inhibits sGC in human platelets with IC50 of 2 uM.

LY-503430 is a novel AMPA receptor (AMPAR) potentiator that selectively enhances glutamate-induced calcium influx into HEK293 cells transfected with human GLUA1, GLUA2, GLUA3, or GLUA4 AMPA receptors with EC50 of 0.1-4 uM.