SY-5609 (CDK7-IN-3) 是一种高选择性，非共价的 CDK7 抑制剂，KD 为 0.065 nM。SY-5609 对 CDK2 (Ki=2600 nM)，CDK9 (Ki=960 nM)，CDK12 (Ki=870 nM) 具有较弱的抑制作用。SY-5609 诱导肿瘤细胞凋亡并具有抗肿瘤活性。 SY-5609 (CDK7-IN-3) is a highly selective, noncovalent CDK7 inhibitor with a KD of 0.065 nM. SY-5609 shows poor inhibition on CDK2 (Ki=2600 nM), CDK9 (Ki=960 nM), CDK12 (Ki=870 nM). SY-5609 induces apoptosis in tumor cells and has antitumor activity.