N-DesmethylBendamustine是Bendamustine的代谢物。它对多种淋巴瘤细胞系及外周血淋巴细胞表现出细胞毒性。

2-(Methylamino)benzoic acid是methyl-N-methylanthranilates(MMA)经酯键水解后的主要代谢产物，反映其在体内的酯基转化过程。MMA可从柑橘类植物中分离获得，具有一定镇痛活性，而2-(Methylamino)benzoic acid常被用于评估MMA在大鼠肝脏中的代谢转化水平。

Micafungin metabolite M1是抗真菌药Micafungin的主要代谢产物之一，由芳基硫酸酯酶介导生成。Micafungin metabolite M1保留一定但较弱的抗真菌活性，对白色念珠菌和曲霉等真菌具有体外抑制作用，常用于Micafungin代谢及抗真菌机制研究。

R-18986 is a biochemical substance.

4-Epioxytetracycline 在生命科学相关研究中具有广泛的应用。

(R)-Linezolid, an impurity of Linezolid, inhibits the initiation of bacterial protein synthesis.

SN-38 glucuronide为Irinotecan这一抗癌活性分子的非活性代谢物。Irinotecan是拓扑异构酶I抑制剂，主要应用于结肠癌及直肠癌的研究。

Salbutamol (albuterol), a selective β2-adrenergic partial agonist, serves as a bronchodilator widely used in various clinical scenarios and to counteract doping abuse. Its process impurity, Albuterol methyl ether, may be present in urine samples, highlighting the importance of detection and chemical analysis.

Descarbonyl-lacosamide is a potential impurity in commercial lacosamide preparations. It is a degradation product that forms under acidic conditions.