FTISADTSK is an endogenous stable signature peptide derived from Trastuzumab, which can be accurately assessed using selected reaction monitoring (SRM).

3-Hydroxyphenazepam 是 Cinazepam 的活性代谢物，后者为一种 GABAA 受体激动剂。该化合物能够抑制突触体转运蛋白介导的 [3H]GABA 摄取。

Simvastatin Acyl-β-D-glucuronide, a metabolite formed from Simvastatin, acts as a competitive inhibitor of HMG-CoA reductase, showcasing a potent Ki of 0.2 nM.

Ibuprofen carboxylic acid is a major metabolite of ibuprofen . It prevents fructose-, cyanate-, and prednisolone-induced inactivation of catalase and fructose- and cyanate-induced inactivation of fumarase when used at a concentration of 2 mM and penetrates into the lens of isolated bovine eyes. Ibuprofen carboxylic acid has been found in bank filtrate and surface water, as well as influent and effluent wastewater, and is considered a micropollutant.

gamma-Glutamylthreonine (γ-Glu-Thr) 是由谷氨酸和苏氨酸以肽键连接形成的二肽。作为 γ- 谷氨酰转肽酶催化的代谢产物，gamma-Glutamylthreonine 在免疫调节中发挥作用，并可用于炎症相关疾病的研究。

Resveratrol-3-O-sulfate is a metabolite of resveratrol . In U-937 cells stimulated with LPS, resveratrol-3-O-sulfate (1 μM) decreases the expression of IL-1α, IL-1β, and IL-6 by 61.2, 76.6, and 42.2%, respectively, and decreases the release of TNF-α and IL-6 to similar levels as resveratrol. It has antioxidant activity in a Trolox assay, dose-dependently decreases growth of Caco-2 colorectal adenocarcinoma cells when used at concentrations ranging from 10 to 100 μM, and induces apoptosis at concentrations of 25 and 50 μM. Resveratrol-3-O-sulfate also displaces rosiglitazone from the outer mitochondrial protein mitoNEET (IC50 = 3.36 μM for the human protein), indicating that it binds to the thiazolidine-2,4-dione (TZD) binding pocket.