Pyruvate Carboxylase-IN-5 (compound 6m) is a pyruvate carboxylase inhibitor with high selectivity and permeability. Pyruvate carboxylase is a mitochondrial enzyme that catalyzes the carboxylation of pyruvate to oxaloacetate, a process that plays an important role in maintaining steady-state levels of Krebs cycle intermediates, which are precursors for the synthesis of biomacromolecules such as amino acids , fatty acids, and glucose.