GSK 256066 Trifluoroacetate is a selective and high-affinity phosphodiesterase 4 (PDE) inhibitor (IC50: 3.2 pM for PDE4B). It can be used for the treatment of chronic obstructive pulmonary disease.

PDE-9 inhibitor is used for treatment neurodegenerative diseases.

Tibenelast sodium is an inhibitor of phosphodiesterase.

Olprinone (Loprinone) Hydrochloride 是一种有效的磷酸二酯酶(PDE) 3抑制剂，对 PDE1，PDE2，PDE3，PDE4 的IC50分别为 150、100、0.35 和 14 μM。Olprinone Hydrochloride 由于具有正性肌力和血管扩张作用而被用于心力衰竭的研究。Olprinone Hydrochloride 具有抗炎活性。

Kushenol B 是一种天然产物，可用于生命科学领域的相关研究。其产品编号为 TN4398，CAS号为 99217-64-8。

LEO 39652 is a dual-soft PDE4 inhibitor with IC50s of 1.2 nM, 1.2 nM, 3.0 nM and 3.8 nM for PDE4A, PDE4B, PDE4C and PDE4D, respectively. LEO 39652 also inhibits TNF-α with an IC50 value of 6.0 nM. LEO 39652 is used for topical research of Atopic dermatitis (AD) [1]. LEO 39652 shows unbound in vitro potency when measured as LPS induced TNF-α release in human peripheral blood mononuclear cells (PBMC), incubated in serum free medium. LEO 39652 shows a relatively high binding to human serum albumin[2]. LEO 39652 is inactivated both in blood and liver (dual-soft) while stabled in the skin[1].Pharmacokinetic AnalysisLEO 39652 exhibits total clearance (rats 930, minipigs 200 and monkey 300 mL/min/kg) and ratio to total AUC (rats 4, minipigs 6 and monkey 6 %) following intravenous administration (rats 0.075, minipigs 0.5 and monkeys 2.0 mg/kg)[1]. [1]. Jens Larsen, et al. Discovery and Early Clinical Development of Isobutyl 1-[8-Methoxy-5-(1-oxo-3 H-isobenzofuran-5-yl)-[1,2,4]triazolo[1,5- a]p