XY028-140是一种 PROTAC 连接体，能够选择性降解 CDK 蛋白，具有抗癌应用的潜力。

BSJ-04-132 is a potent and selective Ribociclib-based CDK4 degrader (PROTAC), with IC50s of 50.6 nM and 30 nM for CDK4/D1 and CDK6/D1, respectively. BSJ-04-132 does not induce CDK6 and IKZF1/3 degradation. BSJ-04-132 has anti-cancer activity.

BSJ-03-204 is a potent and selective Palbociclib-based CDK4/6 dual degrader (PROTAC), with IC50s of 26.9 nM and 10.4 nM for CDK4/D1 and CDK6/D1, respectively. BSJ-03-204 does not induce IKZF1/3 degradation and has anti-cancer activity.

XY028-133 (example 14) is a PROTAC-based CDK4/6 degrader with anti-tumor activity.