Re: BCRX-Presidio merger The latest info on Presidio’s PPI-668 (an NS5A inhibitor) are the 3-day monotherapy data reported in Jun 2012 (#msg-76993511). I continue to maintain that BCRX’s nucleoside drug is based on obsolete and discredited technology (#msg-65152679). All told, therefore, combining these two HCV drugs does not exactly seem like a winning formula for commercial success.