2-Amino-1-cyclopentene-1-carbonitrile-d2 is an intermediate used in the synthesis of Ipidacrine-d9 (Major) (I739332), which is an isotopic analog of ipidacrine, which is used in biological studies as a possible treatment of toxic cognitive disorders;Also, it is the labeled form of 2-Amino-1-cyclopentene-1-carbonitrile (A604080), which is a reagent used in the synthesis of tacrine-huperzine A hybrids as acetylcholinesterase inhibitors.