The present invention relates to a novel class of compounds exhibiting activity inhibitory activity against arginase, and pharmaceutical compositions comprising the compounds of the present invention. Also provided are methods of treating cancer with the arginase inhibitors of the present invention.本発明は、アルギナーゼに対して活性阻害活性を示す新規な種類の化合物、及び本発明の化合物を含む医薬組成物に関する。また、本発明のアルギナーゼ阻害剤でがんを治療する方法も提供する。