definiens: means ( a ) with respect to CELGENE, a Third Party to whom CELGENE has granted alicense under Know - How or Patents Controlled by CELGENE, or a sublicense under Know - How or Patents licensed toCELGENE pursuant to this Agreement, to research, Develop, Manufacture or Commercialize Compounds ( includingLicensed Compounds ), Licensed Products or Diagnostic Products in the Field, and ( b ) with respect to EPIZYME, aThird Party to whom EPIZYME has granted a license under Know - How or Patents Controlled by EPIZYME, or asublicense under Know - How or Patents licensed to EPIZYME pursuant to this Agreement, to research, Develop, Manufacture or Commercialize Compounds ( including Licensed Compounds ), Licensed Products or DiagnosticProducts in the Field ; but in each case excluding any Third Party acting solely as a distributor . For purposes ofclarity, none - 20 -of EPIZYME, its Affiliates, Sublicensees and other licensees shall be deemed a Sublicensee of CELGENE ; and noneof CELGENE, its Affiliates and Sublicensees shall be deemed a Sublicensee of EPIZYME