Meayamycin is an analogue of FR901464 that binds to the splicing factor 3b (SF3b) complex and inhibits pre-mRNA splicing, shows picomolar antiproliferative activity against various cancer cell lines and multidrug-resistant cells..

MDA 19 is a selective human CB2 receptor agonist with Ki of 43.3 nM.

MCT1-IN-4a is a potent, selective monocarboxylate transporter 1 (MCT1) inhibitor with IC50 of 90 nM.

MCOPPB 3Hcl is a nociceptin receptor agonist with pKi of 10.07; weaker activity at other opioid receptors.

Mcl-1-Puma inhibitor 8 is a small-molecule dual-acting compound that targets the apoptotic Mcl-1-PUMA interface with Ki of 0.3 uM (Mcl-1, FPA), reduces multiple cancer cells and inhibits PUMA-mediated apoptosis.

Mcl1-IN-2 is an Mcl-1 inhibitor without a reported IC50 value..

MCL0129 is a selective, potent melanocortin-4 receptor (MC4R) antagonist with Ki of 7.9 nM, without affinity for MC1 and MC3.

Mca-DEVDAPK(Dnp)-OH is a substrate for caspase-3.

MC2884 is a novel hybrid, dual HAT/EZH2 inhibitor with IC50 of 3.27, 8.35 and 4.56 uM for CBP, KAT5 and p300, respectively.

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.

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 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.

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.

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

Malotilate

Malic Enzyme inhibitor ME1 (ME1) is a small molecule inhibitor of Malic Enzyme (ME1) with IC50 of 0.15 uM, suppresses growth of human CRC cells in vitro, with little effect on normal rat intestinal epithelial cells..

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.