Disclosed are compounds of formula (Ia) or a pharmaceutically acceptable salt thereof, pharmaceutical compositions comprising compounds of formula (Ia) and methods of using the same for treating cancer or a respiratory inflammatory disease and inhibiting arginase, wherein R1 is -NHR1a; R1a is -H or -C(O)CH(R1b)NHR1c; and R1b is selected from -H, -(C1-C4 ) alkyl and CH2OR1d and R1cis -H; or R1b and R1c, together with the atom to which they are attached, form a 5-membered heterocyclic ring; and R1d is H or -CH3.
化合物的结构式(Ia)或其药学上可接受的盐已被披露,包括化合物的结构式(Ia)的药物组合物以及使用它们用于治疗癌症或呼吸道炎症性疾病和抑制
精氨酸酶的方法,其中R1为-NHR1a;R1a为-H或-C(O)CH(R1b)NHR1c;R1b从-H,-(C1-C4)烷基和CH2OR1d中选择,R1c为-H;或R1b和R1c与它们附着的原子一起形成5-成员杂环环;R1d为H或-
CH3。