LUF6000 is a potent, selective, positive allosteric modulator (enhancer) of human A3 adenosine receptor, enhance Emax but without affecting agonist potency.

Lucidin (NSC 30546) is a natural component of Rubia tinctorum L. lucidin is mutagenic in bacteria and mammalian cells.

LTV-1 is a highly potent, cell-permeable and reversible LYP (lymphoid tyrosine phosphatase) inhibitor with IC50 of 508 nM.

LTURM34 is a specific DNA-PK inhibitor with an IC50 of 0.034 μM.

LSP1-2111 is a potent, selective, and brain penetrant group III mGluRs agonist with EC50 of 2.2 and 1.7 uM for mGluR4 and mGluR6, respectively.

L-SelenoMethionine is a major natural food-form of selenium.

LSD1-IN-32 is a potent, reversible lysine specific demethylase 1 (LSD1) inhibitor with biochemical IC50 of 83 nM, Kd of 32 nM, cell EC50 of 0.67 uM.

LSD1-IN-11p is a reversible LSD1 inhibitor with IC50/Kd of 79/21 nM.

LSD1 inhibitor-1 is a bisguanidine polyamine analogue that exhibits noncompetitive and specific LSD1 inhibition, with 14.1% remaining LSD1 activity at 10 uM in vitro.

LSD1 inhibitor 24 is a novel potent, selective lysine-specific demethylase 1 (LSD1) inhibitor with IC50 of 1 nM, induces CD11b expression in THP-1 cells with EC50 of 8 nM.

L-ornithine has an antifatigue effect by increasing the efficiency of energy consumption and promoting the excretion of ammonia. It is one of the key reactants in the urea cycle.

Lopixibat chloride (LUM-001, HP-625) is a potent, selectiove, oral inhibitor of sodium bile acid cotransporter and Ileal bile acid transporter (IBAT)..

LOM612 is a potent activator of FOXO nuclear translocation, with an EC50 value of 1.5 μM in cells.

Loganetin is a non-toxic natural product that may be applied in the antibacterial drug development for treating multidrug-resistant Gram negative infections.

LN-1-255 is a 6-alkylidene-2'-substituted penicillin sulfone that acts as an effective beta-lactamase inhibitor.

LMD-A (CCR8 antagonist LMD-A) is a highly potent, small molecule antagonist of chemokine receptor CCR8 with EC50 of 2.5 nM.

LLY-2707 (LLY 2707, LLY2707) is a novel potent, selective, nonsteroidal glucocorticoid receptor antagonist with Ki of 2.13 nM.

LLS30 is a potent, allosteric Galectin-1 (Gal-1) inhibitor, inhibits AR negative cells PC3, DU145, and AR positive cells, 22RV1 and CWR-R1 cells with IC50 of 10.4 μM, 5.3 μM, 3.3 μM and 5.9 μM, respectively.

LLS2 is a novel potent Galectin-1 (Gal1) inhibitor that decreases membrane-associated H-Ras and K-Ras and contributed to the suppression of pErk pathway.

LLP2A is a high-affinity, selective peptidomimetic ligand of α4β1 integrin with IC50 of 2 pM.

LLL3 is a structural analogue of STA-21 that acts as a novel STAT3 inhibitor, inhibits STAT3-dependent transcriptional and DNA binding activities.

Litronesib is a selective, allosteric inhibitor of Eg5, which may result in mitotic disruption, apoptosis and consequently cell death in tumor cells that are actively dividing.

Lirimilast (BAY 19-8004.

Liproxstatin-1 analog is an analog of the ferroptosis inhibitor liproxstatin-1

Linopirdine (DUP-996.

Linopirdine (DUP-996) is a potent Kv7 (KCNQ) voltage-gated potassium channels blcoker.

Lin28-IN-1 is a small-molecule inhibitor of the Lin28/let-7 interaction with IC50 of 4.03 uM.

LIMK1 and 2 dual inhibitor is a potent, selective LIMK1/2 inhibitor with IC50 of <10 nM for both, 15-fold selectivity over B-Raf (IC50=10-100 nM).

Lifirafenib（BGB-283） is a Novel potent and selective RAF Kinase and EGFR inhibitor.

Lidocaine hydrochloride is a local anesthetic and cardiac depressant used as an antiarrhythmia agent.