Losartan is a potent, non peptide antagonist of the angiotensin II receptor type 1. This receptor initiates a signal cascade that causes vasoconstriction. Antagonism of this receptor in turn causes vasodilation by blocking the signal from angiotensin II.

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.

Loratadine(SCH-29851) is a selective inverse peripheral histamine H1-receptor agonist with an IC50 of >32 μM.

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

Loperamide HCl is an opioid-receptor agonist used as long-acting synthetic antidiarrheals.

Lomustine (CeeNU)

Lomerizine dihydrochloride is a relatively new L- and T-type calcium channel blocker used in the treatment of migraine.

Lomefloxacin HCl (Maxaquin)

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.

L-NAME is a nonselective inhibitor of nitric oxide synthetases (NOS) for nNOS (bovine), eNOS (human), and iNOS (murine), with Ki of 15 nM, 39 nM and 4.4 μM, respectively.

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.

Lisinopril Dihydrate is angiotensin-converting enzyme inhibitor, used in treatment of hypertension, congestive heart failure, and heart attacks.

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.

Lincomycin HCl (Lincocin)

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, an amide local anesthetic, has anti-inflammatory properties in vitro and in vivo, possibly due to an attenuation of pro-inflammatory cytokines, intracellular adhesion molecule-1 (ICAM-1), and reduction of neutrophils influx.

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