definiens: shall mean a chemical entity ( i ) that isControlled by CK as of the Effective Date, but which CK has not identified asmeeting the Compound Criteria or criteria similar to the Compound Criteria for aMitotic Kinesin Target as of the Effective Date, or ( ii ) which is developed oracquired by CK outside of the Research Program with no use of [COMPANY] ExistingTechnology or [COMPANY] Library Compounds, Collaboration Technology orPost - Collaboration Technology, and, during the Exclusivity Period or anyExtension Period, in activities not directed to the discovery, development, manufacture or use of Mitotic Kinesin Targets or inhibitors of such MitoticKinesin Targets . It is understood that the term CK Library Compound shallinclude both chemical entities that have actually been synthesized as well asthose that have not been synthesized but that are claimed in a CK Patent, solong as the conception and reduction to practice of such chemical entity weremade in the manner described in clause ( ii ) above