Di-tert-butyl Butylphosphonate-d7 is a by-product intermediate during the synthesis of rac Fosfomycin-D5 (Major) Benzylamine Salt (F727503). It is a deuterium labelled analogue of Fosfomycin antibiotic. Related to Fosfomycin Disodium Salt (F727500), rac Fosfomycin-13C3 Benzylamine Salt (F727502), Fosfomycin Tromethamine (F727505), and Fosfomycin Calcium (F727508).