Etilevodopa (L-Dopa ethyl ester), an ethyl-ester prodrug of Levodopa, is rapidly hydrolyzed to Levodopa and ethanol by nonspecific esterases in the gastrointestinal tract. Etilevodopa is used for the treatment of Parkinson disease (PD). Levodopa is the direct precursor of dopamine and is a suitable prodrug as it facilitates CNS penetration and delivers dopamine.

Halopemide is a potent phospholipase D (PLD) inhibitor, with IC50s of 220 and 310 nM for human PLD1 and PLD2, respectively. Halopemid is a dopamine receptors antagonist, and acts a psychotropic agent.

N-Desmethyl Clomipramine hydrochloride (Desmethylclomipramine hydrochloride) is a primary plasma N-desmethyl metabolite of Clomipramine. Clomipramine is a tricyclic antidepressant.

MJ33 is an active-site-directed, specific, competitive, and reversible phospholipase A2 (PLA2) inhibitor. MJ33 blocks the calcium-independent phospholipase A2 (iPLA2) activity of Prdx6. MJ33 has a critical effect on inflammatory brain damage.

Streptolysin O, a group A streptococcal toxin, is a well-characterized oxygen-labile prototype of a cholesterol-binding bacterial exotoxin. Streptolysin O causes both lysis of cells and cardiotoxicity. Streptolysin O is widely used for the controlled permeabilization of cell membranes. Streptolysin O exists in two forms, a reduced active state and an oxidized reversibly inactive state .

L-Methionine sulfoxide (H-Met(O)-OH), a metabolite of Methionine, induces M1/classical macrophage polarization, and modulates oxidative stress and purinergic signaling parameters.

Obidoxime dichloride is a non-full spectrum oxime agent and can be used as an antidote for organophosphate nerve agent poisoning. Obidoxime dichloride reactivates sarin-inhibited acetylcholinesterase (AChE) and reduces acute toxicity of sarin-evaluated.

U-73122 is an inhibitor of phospholipase C, phospholipase A2, and 5-LO (5-lipoxygenase).

Bay 60-7550 is a potent PDE2 inhibitor with IC50 values of 2.0 nM (bovine) and 4.7 nM (human); 50-fold more selective for PDE2 compared to PDE1 and greater than 100-fold selective compared to PDE5, PDE3B, PDE4B, PDE7B, PDE8A, PDE9A, PDE10A, and PDE11A.

D609 is a selective competitive phosphatidyl choline-specific phospholipase C (PC-PLC) inhibitor (Ki = 6.4 μM); antiviral and antitumor agent.

Merimepodib(VX-497) is a novel noncompetitive inhibitor of IMPDH (Inosine monophosphate dehydrogenase).

Liarozole Dihydrochloride is identified as a modest inhibitor of P450 with IC50 of 2.2–6.0 μM and 260 nM for CYP26 and rat CYP17 respectively.

β-Secretase Inhibitor III is an extremely selective BACE1 inhibitor (Ki = 0.13 nM).

β-Secretase Inhibitor I is an extremely potent β-secretase inhibitor with reduced cardiovascular and liver toxicity.

PTP1B-IN-14 is a selective PTP1B inhibitor (IC50 = 0.72 μM) targeting the allosteric site.

PTP1B-IN-13 is a selective PTP1B inhibitor targeting the allosteric site with an IC50 value of 1.59 μM.

Plantainoside D shows ACE inhibitory activity with IC50 2.17 mM. And plantainoside D is a promising IKK-β inhibitor.

p-Hydroxyphenethyl trans-ferulate has anti-hyperglycemic（yeast α-glucosidase，IC50 19.24 ± 1.73 µmol L-1）, antioxidant, and anti-inflammatory activities. p-Hydroxyphenethyl trans-ferulate shows inhibiting cancer preve

Phenylpyropene C (S14-95), a JAK/STAT pathway inhibitor, can inhibit IFN-γ mediated expression of the reporter gene (IC50=5.4~10.8 μM). Phenylpyropene C also is an inhibitor of acyl-CoA, with an IC50 of 16.0 μM.

PDE4-IN-3 is a novel and orally active PDE4 inhibitor with potent inhibitory affinity (IC50 = 4.2 nM).

PCSK9-IN-2 is a novel small molecule inhibitor of PCSK9-LDLR protein–protein interaction (PPI) with an IC50 value of 7.57 μM.

Okadaic acid, a marine toxin, is an inhibitor of protein phosphatases (PP), including PP1 (IC50=15-50 nM), PP2A (IC50=0.1-0.3 nM), PP3 (IC50=3.7-4 nM), PP4 (IC50=0.1 nM), PP5 (IC50=3.5 nM), with a significantly higher affinity for PP2A. Okadaic acid increase of phosphorylation of a number of proteins by inhibiting PP, and acts a tumor promoter.

N-Desmethyl Sildenafil (Desmethylsildenafil) is a major metabolite of Sildenafil. Sildenafil is a potent phosphodiesterase type 5 (PDE5) inhibitor.

Mulberrofuran G protects ischemic injury-induced cell death via inhibition of NOX4-mediated ROS generation and ER stress. Mulberrofuran G shows moderate inhibiting activity of hepatitis B virus (HBV) DNA replication with the

Millmerranone A shows the acetylcholinesterase inhibitory property.

MeDTC (S-Methyl-N,N-diethylthiocarbamate Sulfone), a Disulfiram metabolite, is a potent, irreversible aldehyde dehydrogenase (ALDH) inhibitor.

MAO-B-IN-2 is a selective and competitive inhibitor of MAO-B and BChE with IC50 values of 0.51 and 7.00 μM, respectively.

Ladostigil (TV-3326) hemitartrate is a dual inhibitor of cholinesterase and brain-selective monoamine oxidase (MAO), with an IC50 of 37.1 and 31.8 μM for MAO-B and AChE, reapectively. Ladostigil hemitartrate could increase cholinergic transmission, prevent the formation of ROS or their actions and be used for the research of depression and Alzheimer's disease.

Isonaringin shows anti-Alzheimer’s activity by inhibiting AChE.

Indoluidin E selectively inhibits DHODH and suppresses cancer cell growth.