The present application provides bifunctional compounds of Formula (Ia): (Ia), or an enantiomer, diastereomer, stereoisomer, or pharmaceutically acceptable salt thereof, which act as protein degradation inducing moieties for one or more of cyclin-dependent kinase 8 (CDK8) and cyclin-dependent kinase 19 (CDK19). The present application also relates to methods for the targeted degradation of CDK8 and/or CDK19 through the use of the bifunctional compounds that link a ubiquitin ligase-binding moiety to a ligand that is capable of binding to CDK8 and/or CDK19 which can be utilized in the treatment of disorders modulated by CDK8 and/or CDK19.
                            当前申请提供了公式 (Ia) 的双功能化合物:(Ia) 或其对应的手性异构体、对映异构体、立体异构体或药用可接受的盐,它们作为诱导蛋白质降解的基团,作用于一种或多种周期蛋白依赖性激酶 8 (CDK8) 和周期蛋白依赖性激酶 19 (CDK19)。当前申请还涉及通过使用将泛素连接酶结合基团与能够结合 CDK8 和/或 CDK19 的
配体连接的双功能化合物来靶向降解 CDK8 和/或 CDK19 的方法,这可以用于治疗由 CDK8 和/或 CDK19 调节的疾病。