Mel56 is a melanogenin analogue. Mel56 can promote the melanin production in human melanoma cells. Mel56 is cytotoxic to cancer cells and induces apoptosis in melanoma cells. Mel56 can be used for the study of melanoma.

MEK-IN-9 (Compound 4-82) is a MEK inhibitor. MEK-IN-9 induces p15 and p27 protein. MEK-IN-9 can be used in the research of renal adenocarcinoma and colorectal cancer.

Meglitinide is an ATP-sensitive potassium (KATP) channel inhibitor. Meglitinide exhibits IC50 values of 0.26 μM, 0.53 μM and 1.6 μM against KATP channels containing SUR1, SUR2A and SUR2B, respectively, with a Kd value of 7 μM for both SUR1 and SUR2A, and a Kd value of 8 μM for SUR2B. Meglitinide binds to the SUR1, SUR2A and SUR2B subunits with high affinity to close KATP channels, acting on a binding site shared by all SUR subtypes, and its interaction with SUR1 carrying the S1237Y mutation remains unchanged. Meglitinide is applicable to research related to type 2 diabetes.

Meayamycin B ((+)-Meayamycin B) is a potent SF3B1 inhibitor. Meayamycin B upregulates the proapoptotic Mcl-1S and downregulates Mcl-1L at the pre-mRNA splicing level. Meayamycin B does not regulate the alternative splicing of Bcl-x. Meayamycin B and ABT-737 synergistically causes Apoptosis. Meayamycin B exhibits anticancer activity against non-small cell lung cancer.

ME-3407 (EF-4040) is a H+-K+-ATPase redistribution disruptor and myosin light chain kinase (MLCK) and protein kinase A inhibitor. ME-3407 blocks gastric acid secretion and aminopyrine accumulation by inhibiting microsomal-to-apical membrane redistribution of H+-K+-ATPase and suppressing MLCK-mediated myosin light chain phosphorylation. ME-3407 is promising for research of peptic ulcer.

MDL-20610 is a potent antirhinovirus compound with an median plaque 50% inhibitory concentrations (IC1/2) of 0.003 µg/mL. MDL-20610 also exhibits activity against human, simian, and bovine rotaviruses and possesses variable enterovirus and paramyxovirus activity. MDL-20610 can be used for antiviral research.

MDL 72832 (hydrochloride) is a 2,3-dihydro-1,4-benzodioxane derivative and a 5-HT1a receptor ligand with high affinity for the 5-HT1a receptor.

MDL 19205 is a cardiotonic agent with inotropic effect. MDL 19205 can be used for the research of cardiovascular disease, such as heart failure.

MDH2-IN-2 is an orally active MDH2 inhibitor with an IC50 of 5.9 μM. MDH2-IN-2 reduces the levels of senescence markers and senescence-associated secretory phenotype (SASP) factors in mammalian cell models. MDH2-IN-2 extends the lifespan and improves the healthspan of *Caenorhabditis elegans*. MDH2-IN-2 alleviates tissue senescence in aged mice, inhibits SASP factors, and restores liver and kidney functions. MDH2-IN-2 is applicable for senescence-related research.

MCULE-3064932370 is a covalent and allosteric SUMO E1 (heterodimer of Aos1 and Uba2) inhibitor with IC50 values ranging from 16.66 μM to 2.96 μM. MCULE-3064932370 inhibits SUMOylation of Uba2. MCULE-3064932370 has anti-cancer activity against breast cancer.

MCH-1623 is a nucleoside analog-derived, RNA-dependent RNA polymerase (RdRP) inhibitor. MCH-1623 interferes with viral RNA synthesis and exhibits broad-spectrum antiviral activity. MCH-1623 effectively inhibits the replication of vesicular stomatitis virus (VSV), influenza A virus (H1N1-PR8), human coronavirus OC43, human metapneumovirus (HMPV) and respiratory syncytial virus (RSV). Administered via inhalation, MCH-1623 exerts significant in vivo activity in mice, reducing pulmonary viral load and IL-6 levels, alleviating pulmonary tissue erythema, and significantly improving the survival rate of mice infected with lethal influenza virus. MCH-1623 can be used to investigate the infection mechanisms of various RNA viruses and for antiviral drug research.

MC-Gly-Gly-Phe-Gly-PAB-MMAE (Compound SMP-81641) is a control targeted linker-agent conjugate. MC-Gly-Gly-Phe-Gly-PAB-MMAE can be used in tumor research.

MC-Gly-Gly-Phe-Gly-cyclopropylacetic acid is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).

MC-GGFG-3-Methylenecyclobutyl (compound L-7B) is an ADC linker used in the synthesis of antibody-drug conjugates (ADCs).

Mc-Asn-Asn-E104 is a conjugate of E104 and a legumain-cleavable linker, can be used for the synthesis of E104 ISACs.

Mc-Asn-Asn is a legumain cleavable linker for antibody-drug conjugates (ADCs) which couples the antibody element to the effecting compound. Mc-Asn-Asn can be used in the synthesis of ADCs.

Masoprocol tetrapivalate (Nordihydroguaiaretic acid tetrapivalate) is a catecholic butane metabolite and also a tyrosine kinase activity inhibitor of IGF-1R and EGFR. Masoprocol tetrapivalate regulates tyrosine kinase signaling pathways associated with cell proliferation. Masoprocol tetrapivalate can be used in the research of proliferative diseases, including malignant, precancerous or benign cancers, and solid tumors.

MARY15 is a pyridinylpiperazine-based derivative of MARY1. MARY15 activates uncoupled mitochondrial respiration and upregulates p-AKT (S473) phosphorylation in renal proximal tubule cells.

Marpinersen, an antisense oligonucleotide, is an ataxin-2 synthesis reducer. It is used for the study of amyotrophic lateral sclerosis.

Mardepodect precursor is the precursor of Mardepodect. Mardepodect precursor. Mardepodect is a potent, selective orally active, and brain-penetrant PDE10A inhibitor with an IC50 of 0.37 nM, with >1000-fold selectivity over other PDEs.

Mapinastine is a biochemical assay reagent.

MAP3K14-IN-1 (Compound 173) is a MAP3K14 (NIK kinase) inhibitor with an IC50 of 1.8 nM. MAP3K14-IN-1 inhibits the autophosphorylation of MAP3K14 kinase. MAP3K14-IN-1 reduces the level of phosphorylated IKKα in cancer cells. MAP3K14-IN-1 inhibits the proliferation of multiple myeloma cells. MAP3K14-IN-1 can be used in research related to multiple myeloma.

MAO-B-IN-53 is a human monoamine oxidase B (hMAO-B) inhibitor with an IC50 of 0.066 μM. MAO-B-IN-53 exhibits mixed reversible inhibition, binds stably to the hMAO-B active site, and shows high selectivity over hMAO-A. MAO-B-IN-53 acts as a neuroprotective agent, protects against 6-OHDA-induced damage, and exhibits low neurotoxicity in neuroblastoma cells. MAO-B-IN-53 can be used for the research of Parkinson's disease.

MAO-B-IN-50 (Compound C20) is a selective MAO-B inhibitor with an IC50 value of 0.06 μM. MAO-B-IN-50 shows good inhibitory effects on the aggregation of Aβ40/42 and Tau proteins, with overall IC50 values around 1 μM. MAO-B-IN-50 exhibits potent and selective AChE inhibition (IC50 = 1.78 μM). MAO-B-IN-50 can be used in the research of Alzheimer's disease.

MAO-B-IN-49 is a selective and reversible MAO-B inhibitor (IC50 of 1 nM for human MAO-B). MAO-B-IN-49 shows much higher selectivity for MAO-B than for MAO-A (IC50 = 633.9 μM). MAO-B-IN-49 can reduce ROS production induced by Lipopolysaccharides (LPS) in HT22 cells. MAO-B-IN-49 demonstrates substantial neuroprotective properties and significantly improves motor dysfunction in MPTP-induced mouse models of Parkinson’s disease (PD). MAO-B-IN-49 can be used for the study of PD.

Man-GIcNAc-oxazoline (compound 6) is an N-acetylglucosamine (GlcNAc) and azide-modified disaccharide that can be used to label antibodies. Man-GIcNAc-oxazoline can be synthesized as an ADC via click chemistry.

Mal-Pip-ValCit-PAB-AZ7550 is a prodrug of EGFR inhibitor. Mal-Pip-ValCit-PAB-AZ7550 selectively binds covalently to albumin via its maleimide moiety. Mal-Pip-ValCit-PAB-AZ7550 exhibits potent in vivo anticancer activity in non-small cell lung cancer xenograft models. Mal-Pip-ValCit-PAB-AZ7550 can be used in research related to non-small cell lung cancer.

Mal-PEG-NHS ester (MW 2000) is a PEG linker, can be used to link lipoteichoic acid (LTA) and CpG DNA fragments to synthesis CpG-TA Heterodiners. Mal-PEG-NHS ester (MW 2000) can be used for immune stimulation research.

Mal-PEG2-Val-Arg-PABC-OMe-Eribulin (Compound L-1) is a drug-linker conjugate composed of O-Me Eribulin and the linker Mal-PEG2-Val-Cit-PAB-OH. Mal-PEG2-Val-Arg-PABC-OMe-Eribulin can be used to synthesize anti-HER3/MET antibody-drug conjugates (ADCs).

Mal-PEG2-azide is a PEG ADC linker, can be used for ADC synthesis.