L-165041 is a potent PPARδ agonist (Ki = 6 nM).

L-257 (DDAH-1 inhibitor L-257) is a selective, competitive DDAH1 inhibitor with IC50 of <25 uM.

L-291 (DDAH-1 inhibitor L-291) is a selective, competitive DDAH1 inhibitor with IC50 of <25 uM.

L-338192 is a small molecule inhibitor that effectively inhibits the β-catenin/Tcf4 interaction with Ki of 29 uM in AlphaScreen assay.

L-364373 (R-L3) is a stereospecific activator of cardiac slowly activating delayed rectifier K+ current (IKs) and KV7.1 (KCNQ1) channels.

L-5-Hydroxytryptophan (L-5-HTP), a naturally occurring amino acid and a dietary supplement for use as an antidepressant, appetite suppressant, and sleep aid, is the immediate precursor of the neurotransmitter serotonin and a reserpine antagonist. L-5-Hydr

L-826,266 is a potent and selective competitive antagonist of the prostaglandin E2 receptor subtype EP3 (Ki = 0.8 nM).

Lacidipine (Lacipil, Motens) is a L-type calcium channel blocker.

Lactimidomycin is a glutarimide antibiotic that has antifungal, antiviral and anti-cancer properties, acting as a direct inhibitor of protein translation in ribosomes.

LAF389 is a potent methionine aminopeptidase (MetAP) inhibitor with IC50 of 800 nM for MetAP-2, inhibits both MetAp1 and 2, potently inhibits HUVEC proliferation with IC50 of 20 nM.

Lanifibranor, also known as IVA-337, is a peroxisome proliferator-activated receptors (PPAR) agonist.

Laninamivir (CS-8958) is a neuraminidase inhibitor which is being researched for the treatment and prophylaxis of Influenzavirus A and Influenzavirus B.

Lanperisone (NK 433) is a centrally acting muscle relaxant that selectively kills of K-ras mutant cancer cells in a cell cycle-independent fashion.

L-AP4 is a selective group III metabotropic glutamate receptor agonist..

Lapatinib ditosylate(GW-572016 ditosylate) is a potent EGFR and ErbB2 inhibitor with IC50 of 10.8 and 9.2 nM, respectively.

LAS195319 (LAS-195319) is a potent, selective, inhaled PI3Kδ inhibitor with IC50 of 0.5 nM, weakly inhibits PI3Kβ and γ (>20-fold), no activity against PI3Kα.

LASV inhibitor 3.3 (LAMP1 inhibitor 3.3) is a specific inhibitor of Lassa fever virus (LASV, IC50=1.8 uM), inhibits LASV GP-mediated infection and cross-links to the LASV receptor, LAMP1, in cells; does not inhibits the GP-mediated infection of LCMV, LuJo

Lathosterol is a cholesterol-like molecule. Serum Lathosterol concentration is an indicator of whole-body cholesterol synthesis.

Lauric Acid is a saturated medium-chain fatty acid with a 12-carbon backbone. Lauric acid is found naturally in various plant and animal fats and oils, and is a major component of coconut oil and palm kernel oil.

Lazabemide(Ro 19-6327/000) is selective, reversible monoamine oxidase B (MAO-B) inhibitor (IC50 values are 0.03 and > 100 μM for MAO-B and MAO-A respectively).

LB-102 (LB-1.2, LB 102) is a a selective dopamine D2/3/5-HT7 inhibitor.

LB42908 is a highly potent, selective, orally active inhibitor of Ras farnesyltransferase (FTase) with IC50 of 0.9 nM against H-Ras and 2.4 nM against K-Ras..