definiens: means ( a ) with respect to [COMPANY], a Third Party to whom [COMPANY] has granted a license under Know - How orPatents Controlled by [COMPANY], or a sublicense under Know - How or Patents licensed to [COMPANY] pursuant to this Agreement, toresearch, Develop, manufacture or Commercialize Licensed Compounds, Licensed Products or Diagnostic Products in theField, and ( b ) with respect to EPIZYME, a Third Party to whom EPIZYME has granted a license under Know - How or PatentsControlled by EPIZYME, or a sublicense under Know - How or Patents licensed to EPIZYME pursuant to this Agreement, toresearch Licensed Compounds or to research, Develop, manufacture or Commercialize EPIZYME Compounds, EPIZYMEProducts or EPIZYME Diagnostic Products in the Field ; but in each case excluding any Third Party acting solely as adistributor