Lurbinectedin is a novel anticancer drug with a unique mechanism of action. During the production process, impurities may be introduced that can impact the safety, efficacy, and quality of the final product. Therefore, it is important to closely monitor and control the levels of impurities present in Lurbinectedin. These impurities can include related compounds, starting materials, and degradation products. Analytical methods are used to identify and quantify impurities, and strict regulations are in place to ensure their levels remain within acceptable limits.