K-8012, a sulindac (HY-B0008) analog, is a potent antagonist of RXRa. The IC₅₀ value for K-8012 to inhibit 9-cis-RA-induced Gal4-RXRa-LBD trans-activation were about 9.2 μM. K-8012 exerts improved anticancer activity over sulindac in a RXRa-dependent manner. K-8012 exhibits activity in inhibiting the tRXRa-mediated PI3K/AKT signaling pathway. K-8012 induces apoptosis and inhibits AKT activation by preventing tRXRa from binding to p85a^[1].