Used as an internal standard in analytical chemistry for the quantification of rosuvastatin in biological samples. It aids in ensuring accuracy and precision in pharmacokinetic studies and drug monitoring. Its deuterated form allows for reliable differentiation from non-labeled rosuvastatin during mass spectrometry analysis, reducing interference and improving detection limits. This compound is essential in clinical research and drug development for studying the metabolism, distribution, and excretion of rosuvastatin in the body.