ACP-5862 is a major active and pyrrolidine ring-opened metabolite of Acalabrutinib (IC50: 5.0 nM for BTK). Acalabrutinib is an irreversible and highly selective BTK inhibitor (IC50: 3 nM; EC50: 8 nM).
GDC-0834 inhibits BTK with an in vitro IC50 of 5.9 and 6.4 nM in biochemical and cellular assays, respectively, and in vivo IC50 of 1.1 and 5.6 μM in mouse and rat, respectively. GDC-0834 is a potent and selective BTK inhib