Nortadalafil is demethyl Tadalafil, which is a PDE5 inhibitor, currently marketed in pill form for treating erectile dysfunction (ED) under the name Cialis; and under the name Adcirca for the treatment of pulmonary arterial hypertension. IC50 value: Ta

Toddacoumalone is a natural inhibitor of phosphodiesterase 4 (PDE4) with moderate potency and imperfect drug-like properties. Toddacoumalone has the potential for the research of inflammatory diseases such as psoriasis.

ATX inhibitor 8 is a Autotaxin (ATX) inhibitor extracted from patent WO2018212534A1 compound 96.

Drotaverine (hydrochloride) is a type 4 cyclic nucleotide phosphodiesterase (PDE4) inhibitor and an L-type voltage-dependent calcium channel (L-VDCC) blocker, blocks the degradation of 3',5'-cyclic adenosine monophosphate. Drotaverine (hydrochloride) exhibits in vivo antispasmodic efficacy without anticholinergic effects.

Hcyb1 is a highly selective PDE2 inhibitor. Hcyb1 has a highly selective inhibition of PDE2A (IC50=0.57 μM) and over 250-fold selectivity against other recombinant PDE family members. Hcyb1 produces neuroprotective and antidepressant‐like effects most likely mediated by cAMP/cGMP-CREB-BDNF signaling.

Enpp-1-IN-6 is a potent inhibitor of ectonucleotide pyrophosphatase-phosphodiesterase 1 (enpp-1). The ENPP 1 has broad specificity and can cleave a variety of substrates, including phosphodiester bonds of nucleotides and nucleotide sugars and pyrophosphate bonds nucleotides and nucleotide sugars. Enpp-1-IN-6 has the potential for the research of cancer and infectious diseases (extracted from patent WO2021203772A1, compound 51).

Enpp-1-IN-8 is a potent inhibitor of ectonucleotide pyrophosphatase-phosphodiesterase 1 (enpp-1). The ENPP 1 has broad specificity and can cleave a variety of substrates, including phosphodiester bonds of nucleotides and nucleotide sugars and pyrophosphate bonds nucleotides and nucleotide sugars. Enpp-1-IN-8 has the potential for the research of cancer and infectious diseases (extracted from patent WO2021203772A1, compound 51).

Enpp-1-IN-4 is a potent inhibitor of ectonucleotide pyrophosphatase-phosphodiesterase 1 (enpp-1). Enpp-1-IN-4 has the potential for the research of cancer diseases (extracted from patent WO2019177971A1, compound 1).

Enpp-1-IN-7 is a potent inhibitor of ectonucleotide pyrophosphatase-phosphodiesterase 1 (enpp-1). The ENPP 1 has broad specificity and can cleave a variety of substrates, including phosphodiester bonds of nucleotides and nucleotide sugars and pyrophosphate bonds nucleotides and nucleotide sugars. Enpp-1-IN-7 has the potential for the research of cancer and infectious diseases (extracted from patent WO2021203772A1, compound 51).

Enpp-1-IN-5 is a potent inhibitor of ectonucleotide pyrophosphatase-phosphodiesterase 1 (enpp-1). The ENPP 1 has broad specificity and can cleave a variety of substrates, including phosphodiester bonds of nucleotides and nucleotide sugars and pyrophosphate bonds nucleotides and nucleotide sugars. Enpp-1-IN-5 has the potential for the research of cancer and infectious diseases (extracted from patent WO2019046778A1/WO2021203772A1, compound 1).

Enpp-1-IN-9 is a potent inhibitor of ectonucleotide pyrophosphatase-phosphodiesterase 1 (enpp-1). The ENPP 1 has broad specificity and can cleave a variety of substrates, including phosphodiester bonds of nucleotides and nucleotide sugars and pyrophosphate bonds nucleotides and nucleotide sugars. Enpp-1-IN-9 has the potential for the research of cancer and infectious diseases (extracted from patent WO2021203772A1, compound 51).

PF-04447943 is a brain-permeable phosphodiesterase (PDE) inhibitor that is selective for PDE9A (IC50 = 12 nM) over other PDEs (IC50s = >940 nM) in enzymatic assays of second messenger hydrolysis.

BI 409306 is an inhibitor of phosphodisterase 9A（PDE9A）.

Avanafil(TA-1790) is a potent and highly selective phosphodiesterase-5(PDE-5) inhibitor(IC50=5.2 nM) for erectile dysfunction; lower selectivity against PDE1, PDE6, and PDE11.

BW-A 78U is a PDE4 inhibitor with an IC50 of 3 μM.

PDE2A-IN-1 is a phosphodiesterase 2A (PDE2A) inhibitor with an IC50 value of 1.3 nM.

Cudetaxestat (BLD-0409) is a potent and orally active autotaxin (ATX) inhibitor.

ATX inhibitor 7 is a autotaxin inhibitor and shows good oral exposure.

Arofylline is a PDE4 inhibitor as a potential treatment for asthma.

Andolast is an anti-allergic agent for the treatment of bronchial asthma, chronic obstructive pulmonary disease (COPD). Andolast inhibits dose dependently guinea-pig lung cAMP-phosphodiesterase with an IC50 of 50 mM.

Mufemilast is a phosphodiesterase 4 (PDE4) inhibitor.

Tadalafil is a potent and selective inhibitor of Phosphodiesterase-5 (PDE5) This compound prevents the breakdown of phosphodiesterases, many of which are used as secondary messengers. By preventing the breakdown of these messenger molecules, tadalafil can

DSR-141562 is a novel, orally active, and selective brain-penetrant phosphodiesterase 1 (PDE1) inhibitor. DSR-141562 shows preferential selectivity for human PDE1B with an IC50 of 43.9 nM, and the IC50 values for human PDE1A and 1C are 97.6 and 431.8 nM, respectively. DSR-141562 can be used for the study of positive symptoms, negative symptoms and cognitive impairments associated with schizophrenia.

IBMX(NSC165960; SC2964) is a competitive nonselective PDEs inhibitor with IC50 of 2-50 uM but does not inhibit PDE8 or PDE9; nonselective adenosine receptor antagonist.

PF-05180999 (PF 5180999) is a potent, selective, brain-penetrating and orally bioavailable phosphodiesterase 2A (PDE2A) inhibitor with IC50 of 1 nM.

PDE4-IN-4 is a dual M3 (pIC50 = 10.2) antagonist-PDE4 (pIC50 = 8.8) inhibitor for the inhaled treatment of pulmonary diseases.

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.

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

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

Ro 20-1724 (Ro 20-174) is a potent inhibitor of cAMP-specific phosphodiesterase (PDE4/PDE IV) with a Ki of 1930 nM. Neuroprotective effect.