This invention relates to (2S,2'R,3'R)-2-(2,3-dicarboxyl-cyclopropyl)-glycine of formula ##STR1## wherein R.sub.2 is hydrogen or tritium and to a process for the preparation thereof. The described compounds can be used as a pharmacological tool to study the function of group II mGluR (metabotropic glutamate receptor).
                            这项发明涉及到式为(2S,2'R,3'R)-2-(2,3-二羧基环丙基)-甘
氨酸的化合物,其中R.sub.2为氢或氚,并涉及其制备方法。所述化合物可用作研究II型mGluR(代谢型谷
氨酸受体)功能的药理学工具。