definiens: shall mean any ( a ) Information or Invention, to the extent directed to any Idenix Nucleoside or Collaboration Compound or a method of making or using an Idenix Nucleoside or Collaboration Compound, that is Controlled by Idenix as of the Effective Date, ( b ) Information or Invention, to the extent directed to any Idenix Nucleoside or a method of making or using an Idenix Nucleoside, that first becomes Controlled by Idenix during the Research Term, and ( c ) Information or Invention, to the extent directed to a Collaboration Compound or a method of making or using a Collaboration Compound, that first becomes Controlled by Idenix after the Research Term but prior to the First Commercial Sale of any Product that contains such Collaboration Compound . Notwithstanding the foregoing, subsection ( b ) does not include any Information or Invention to the extent directed to a Collaboration Compound or a method of making or using a Collaboration Compound . For purposes of clarity, Idenix Know - How does not include Metabasis Know - How