The invention relates to a novel class of compounds that exhibit activity inhibitory activity toward arginase, and pharmaceutical compositions comprising the compounds of the invention. Also provided herein are methods of treating cancer with the arginase inhibitors of the invention.本發明係關於展現對精胺酸酶抑制活性之活性的新穎種類之化合物及包含本發明化合物的醫藥組合物。本文亦提供藉由本發明之精胺酸酶抑制劑治療癌症之方法。