Roflumilast (APTA 2217) 是一种口服的长效 4 型磷酸二酯酶抑制剂 (PDE4)，具有抗炎和潜在的抗肿瘤活性，作用于PDE4A1，PDEA4，PDEB1和PDEB2，IC50分别为 0.7，0.9，0.7 和 0.2 nM。

Parogrelil Free Base (NM-702 Free Base) 是一种选择性磷酸二酯酶3抑制剂，具有支气管扩张和抗炎作用，抑制白三烯（LT）D（4）和组胺诱导的离体豚鼠气管条的收缩，可用于研究支气管哮喘。

Lodenafil carbonate, a prodrug dimer that delivers Lodenafil in vivo, is an orally active inhibitor of phosphodiesterase type 5 (PDE5), indicated for the treatment of erectile dysfunction (ED)[1][2].

Enpp-1-IN-5 是一种有效的外核苷酸焦磷酸酶-磷酸二酯酶 1 (enpp-1) 抑制剂。ENPP 1 显示出广泛的特异性，能够切割多种底物（包括核苷酸和核苷酸糖的磷酸二酯键、核苷酸和核苷酸糖的焦磷酸键）。 Enpp-1-IN-5 具有潜力进行癌症和传染病的研究。

PF-04671536 is a highly potent and selective inhibitor of phosphodiesterase 8B (PDE8B) phosphodiesterase 8A (PDE8A). In primary human pancreatic islets, PF-04671536 increases insulin secretion in a glucose-dependent manner.

4-Nitrophenyl phenylphosphonate is a substrate for 5'-nucleotide phosphodiesterases. It is a more preferable substrate to 5'-nucleotide phosphodiesterases than naturally occurring nucleotides or bis(4-nitrophenyl) phosphate because of its stability, ease of synthesis, and higher rate of hydrolysis under saturating conditions.

Metaxalone (Methaxalonum) 具有肌肉松弛作用。

PDE11-IN-1 是一种PDE11抑制剂，可用于肾上腺机能不全的研究。

ITI-214 free base is a picomolar PDE1 inhibitor with excellent selectivity against other PDE family members and against a panel of enzymes, receptors, transporters, and ion channels, exhibits potent PDE1 inhibitory activity (Ki = 58 pM).