MALAT1 inhibitor 5 (Malat1 inhibitor 5) is a selective small molecule targeting of Metastasis-associated lung adenocarcinoma transcript 1 (Malat1/MALAT1 mouse/human), a highly conserved long non-coding RNA; does not affect Neat1 lncRNA levels.

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..

Maltitol is a sugar alcohol used as a sugar substitute. It has 75-90% of the sweetness of sucrose (table sugar) and nearly identical properties. Maltitol may also be used as a plasticizer in gelatin capsules, as an emollient, and as a humectant.

MAP4K4-IN-17 is a potent and highly selective MAP4K4 inhibitor with IC50 of 14.9 nM, showes improved overall drug-like properties compared to PF-06260933.

Maraviroc (Selzentry, UK-427857, Celsentri) is a CCR5 antagonist for MIP-1α, MIP-1β and RANTES with IC50 of 3.3 nM, 7.2 nM and 5.2 nM, respectively.

Maribavir(GW257406X; BW1263W94; 1263W94) inhibits HCMV replication is by inhibition of an HCMV encoded protein kinase enzyme called UL97 or pUL97.

Marmesin is a coumarin originally isolated from the mature bark of A. marmelos.

Masitinib is a broad coronavirus 3CL inhibitor that effectively blocks replication of SARS-CoV-2. Science 20 Jul 2021: eabg5827 DOI: 10.1126/science.abg5827

Mavacamten（MYK-461）is a small molecule that reduces contractility by decreasing the ATPase activity of the cardiac myosin heavy chain.

Mavatrep is an orally bioavailable TRPV1 antagonist (Ki=6.5 nM), exhibits minimal effect on the enzymatic activity (IC50 > 25 μM) of CYP isoforms 3A4, 1A2, and 2D6.

Mavoglurant (AFQ056) is an experimental drug candidate for the treatment of fragile X syndrome.It exerts its effect as an antagonist of the metabotropic glutamate receptor 5 (mGLU5).

MAZ51 is an indolinone that selectively antagonizes the activation of VEGFR3 by VEGFC (IC50 = 1 µM) without blocking VEGFC-mediated stimulation of VEGFR2.

MB-07811 (VK-2809) is an orally bioavailable, liver-targeted prodrug of MB07344, which is a thyroid hormone receptor-beta agonist (TRβ) agonist, efficiently converted to MB07344 by liver microsomes in vivo.

MB725 is a small-molecule p53 mutant Y220C stabilizer, induces selective viability reduction in several p53-Y220C cancer cell lines (Huh7 cell IC50=10 uM).

MBP146-78 inhibits the growth of Eimeria spp. both in vitro and in vivo.

MBX-2982 is a selective, orally-available GPR119 agonist for the treatment of type 2 tiabetes.

MBX-4132 a trans translation inhibitor by binding to the bacterial ribosome.

MC1568 is a class II (IIa) HDAC inhibitor selective for HDAC4 and HDAC6

MC180295 (MC-180295, MC 180295) is a novel potent, highly selective CDK9 inhibitor with IC50 of 5 nM, displays >22-fold selectivity over other CDKs.

MC3343 (MC-3343) is a novel potent, non-nucleoside DNA methyltransferase (DNMT) inhibitor with IC50 of 5.7 and 1.7 uM for DNMT1 and DNMT3a.

Mca-PL is a fluorogenic peptide that has been used as a building block in the synthesis of Mca-PLGL-Dpa-AR-NH2, a fluorogenic substrate for matrix metalloproteinase-2 (MMP-2) and MMP-7.

MCB-613 is a novel and potent stimulator of p160 steroid receptor coactivators (SRCs). It is a Pan-SRCs stimulator.