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