Tert-butyl 2,5-diazabicyclo[2.2.2]octane-2-carboxylate hemioxalate (CAS# 1629904-92-2) is a useful building block, used in the patented preparation of triazine-containing positive allosteric modulators of GABAB receptors, and other triazine compounds for the potential use of malaria and chemoprophylaxis treatment.