Used as a stable isotope-labeled internal standard in mass spectrometry-based bioanalytical studies to accurately quantify meropenem in biological samples such as plasma, serum, and urine. Its primary application is in pharmacokinetic and metabolism studies, where it helps differentiate between the labeled compound and endogenous substances, ensuring high precision and reliability in drug concentration measurements. Due to its structural similarity to meropenem with minimal mass difference, it closely mimics the behavior of the unlabeled drug during sample processing and ionization, making it ideal for LC-MS/MS assays.