3-Amino-2-hydroxy-4-phenylbutanoyl-leucyl-asparagines which are related to bestatin in their chemical structure and which are active to enhance the immune response in living animals are now provided.
3-Amino-2-hydroxy-4-phenylbutanoyl-leucyl-asparagines 与 bestatin 的
化学结构有关,具有增强活体动物免疫反应的活性。