PDE11-IN-1 是一种PDE11抑制剂，可用于肾上腺机能不全的研究。

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].

PDE5-IN-4为磷酸二酯酶5（PDE5）抑制剂，应用于急性心肌梗死及再灌注损伤、消化系统疾病、糖尿病相关损害及肝功能衰竭的研究。

ENPP1 inhibitor 43 is a novel small molecule for cancer immunotherapy.

Tetomilast (OPC-6535) is a phosphodiesterase-4 (PDE4) inhibitor, potentially effective in treating inflammatory bowel disease (IBD) and chronic obstructive pulmonary disease (COPD).

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.

CDP-840 (GR259653X) 是一种有效的、选择性和口服活性的phosphodiesterase IV (PDE IV)抑制剂。CDP-840 抑制有意识的松鼠猴中抗原诱导的早期和晚期支气管收缩。

Tadalafil-D3是Tadalafil (T1398)的氘代化合物。Tadalafil的CAS号为171596-29-5。Tadalafil是一种PDE5抑制剂，IC50为 1.8 nM。

Ophiobolin A is a fungal metabolite and a phytotoxin and is an effective and irreversibly inhibitor of calmodulin-activated cyclic nucleotide phosphodiesterase (IC50: 9 μM). Ophiobolin A also has antimicrobial and anticancer activity.