I am not sure but i think the NS5A inhibitor that they are making good progess with is not the one they bought but may be a derivative of that compound.
Just one other thing about Presidio . I believe one of the bright minds over there came from BMS . BMS is another company that is rapidly climbing the HCV ladder and soon to be a player.I am not saying proprietary information changed hands but every day in the pharmaceutical industry someone leave company x to go to company y and they bring an irreplaceable amount of experience and know how to that new company.Sometimes this helps get company y over the greatest hurdle for any small start up . An approval drug.