Ampicillin (t-Butyl-d3)-demethylbenzenemethanamine is deuterium labeled Ampicillin t-Butyl-demethylbenzenemethanamine (A634385), whichÂcan be used to develop HPLC methods that detectÂcompounds or impurities related to ampicillin in bulk drug.ÂAmpicillin t-Butyl-demethylbenzenemethanamineÂis a related compound ofÂAmpicillin (A634300), aÂβ-lactamÂantibiotic used for treating bacterial infection.ÂAmpicillin interferes with cell wall synthesis in bacteria.