Irsogladine maleate is a selective PDE4 inhibitor that facilitates gap junction intercellular communication through muscarinic acetylcholine receptor binding. It is a potent inhibitor of angiogenesis in wild-type and plasminogen activator-deficient mice.

Milrinone(Primacor) is a a potent and selective phosphodiesterase 3 inhibitor with an IC50 of 0.42 μM for the inhibition of FIII PDE

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

Oglemilast(GRC3886) is a potent PDE4 inhibitor, under clinical studies in the treatment of allergen-induced asthma.

Olprinone Hcl(Loprinone Hcl) is a selective phosphodiesterase 3 (PDE3) inhibitor.

PDE1-IN-2 is an inhibitor of PDE1 extracted from patent WO2016/55618 A1, example 31; has IC50 values of 6, 140 and 164 nM for PDE1C, PDE1B and PDE1A, respectvely.

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.

PF-04957325 is a highly potent and selective PDE8 inhibitor, with IC50 values of 0.7 nM for PDE8A and less than 0.3 nM for PDE8B.

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

PF-2545920 a highly selective and potent PDE10A inhibitor with an IC50 of 0.37 nM.

PF-8380 is a potent and specofic autotaxin inhibitor with an IC50 value of 2.8 nM.

Roflumilast (Daxas) is a selective inhibitor of PDE4 with IC50 of 0.2-4.3 nM.

RPL-554 (LS-193855, RPL554) is a potent, orally available, dual PDE3/PDE4 inhibitor with IC50 of 0.4 nM and 1479 nM, respectively.

SEP-0372814 is a potent PDE10 inhibitor.

Sildenafil citrate, one of the selective phosphodiesterase-5 (PDE5) inhibitors(IC50= 5.22 nM), is considered the best treatment for erectile dysfunction.

Specific inhibitor of cyclic GMP phosphodiesterase, selective for PDE5 (IC50 = 0.5 μM).

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

TAK-063 is a highly potent, selective and orally active PDE10A inhibitor with IC50 of 0.30 nM; >15000-fold selectivity over other PDEs.

BAY 73-6691 is a drug developed by Bayer for the treatment of Alzheimer's disease. It was the first compound developed that acts as a phosphodiesterase inhibitor selective for the PDE9A subtype.

Udenafil is a new phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction (ED)

Vardenafil is a PDE5 inhibitor used for treating erectile dysfunction.

Vesnarinone is a quinolinone derivative, and its pharmacodynamic effects include inhibition of phosphodiesterase III (PDE3) activity, increases in calcium flux and decreases in potassium flux.