Abstract [6, 8-14 C 2]-Bisaramil: 3-methyl-7-ethyl-9α-(4-chlorobenzoyloxy)-3, 7- diazabicyclo/3.3. 1./nonane-[6, 8-14 C 2] monohydrochloride and [7-ND 5-ethyl]-Bisaramil: 3- methyl-7-[D 5-ethyl]-9α-(4-chlorobenzoyloxy)-3, 7-diazabicyclo/3.3. 1./nonane monohydrochloride were synthesized in four steps from 14 CO 2 (6% overall yield) and in six steps from [D 6]-ethanol (4% overall yield), respectively.