Ranitidine-S-oxide is a metabolite of Ranitidine. It is commonly used in the treatment of peptic ulcer disease, Zollinger–Ellison syndrome，and gastroesophageal reflux disease.

Deschloro Cetirizine Dihydrochloride 为 Cetirizine 杂质(impurity)。Cetirizine 属于第二代抗组胺药，作为羟嗪羧化代谢物，它表现为特异性、口服活性的长效组胺 H1 受体(histamine H1-receptor)拮抗剂。

Nicorandil N-oxide, a metabolite of nicorandil, functions as an activator of the ATP-sensitive potassium channel Kir6.2 (SUR2B/Kir6.2) and is associated with the sulfonylurea receptor 2B (SUR2B), while also serving as a nitric oxide donor.

Lansoprazole N-oxide is a potential impurity in lansoprazole bulk preparations, identified as a degradation product under acidic or basic conditions. This compound is related to lansoprazole, a proton pump inhibitor.

N-Desmethyl clotiazepam (Desmethylclotiazepam) 是 Clotiazepam 的有效代谢产物。

11β-Prostaglandin F2αethanolamide (11β-PGF2α-EA), posited as the hepatic metabolite derived from PGD2-EA during COX-2 metabolism of AEA—an endogenous cannabinoid present in brain, liver, and various mammalian tissues—is synthesized directly from AEA via COX-2 and specific prostaglandin synthase, leading to ethanolamide versions of classical prostaglandins. Additionally, PGD2-EA formation occurs in activated RAW 264.7 cells upon AEA treatment.