Information ONO-4059 analogue ONO-4059 analogue (ONO-WG-307) is an analogue of ONO-4059, which is a highly potent and selective oral BTK inhibitor with IC50 of 23.9 nM. Phase 1. Targets BTK 23.9 nM In vitro In TMD-8 cells, ONO-4059 inhibits cell growth with IC50 of 3.59 nM, and induces cell apoptosis. The combination of of ONO-4059 with doxorubicin, etoposide, vincristine or dexamethasone causes the increased apoptosis ratio.