PF04677490 is an effective PDE1 inhibitor. PF04677490 efficaciously inhibits cAMP- and cGMP-hydrolytic activity in preparations from human myocardium at concentrations selective for PDE1.
Orlistat degradation product is a degradation product of the digestive lipase inhibitor orlistat . It is formed via hydrolytic and thermal degradation as well as digestion by human carboxyl ester lipase.
Prostaglandin E1 (PGE1), synthesized through cyclooxygenase-mediated metabolism of dihomo-γ-linolenic acid (DGLA), functions by inhibiting platelet aggregation (IC50= 40 nM) and enhancing vasodilation. Its analog, 13,14-dihydro-16,16-difluoro PGE1, and the metabolite, 13,14-dihydro PGE1, both retain similar anti-aggregatory properties to the original compound. The inclusion of two electron-withdrawing fluorine atoms in 13,14-dihydro-16,16-difluoro PGE1 is believed to increase molecular stability and potentially extend bioavailability by resisting hydrolytic degradation.
Arachidoyl ethanolamide, a saturated fatty acyl ethanolamide lacking classical (CB1 CB2) activity, plays a role in a complex system comprising central cannabinoid (CB1), peripheral cannabinoid (CB2), and non-CB receptor-mediated pharmacology. This system has paved the way for extensive research in diverse fields such as memory, weight loss and appetite, neurodegeneration, tumor surveillance, analgesia, and inflammation. Unlike other compounds, Arachidoyl ethanolamide does not bind to the murine CB1 receptor nor does it compete with anandamide for the fatty acid amide hydrolase, the endocannabinoid hydrolytic enzyme. The non-CB receptor-mediated actions of saturated ethanolamides like Arachidoyl ethanolamide are currently under investigation.
(3R,5R)-Rosuvastatin, a potential impurity detected in bulk rosuvastatin formulations, arises as a degradation product through various stresses including acid or base hydrolysis, thermal, photolytic, hydrolytic, oxidative stress, or during storage. This compound is associated with the HMG-CoA reductase inhibitor class to which rosuvastatin belongs.