definiens: means an exclusive, perpetual, worldwide, sublicensable licence to use the relevant Licence - Back IP andLicence - Back Material solely to research, have researched, develop, have developed, register, have registered, use, have used, make, have made, import, have imported, export, have exported, market, have marketed, distribute, have distributed, sell and havesold the relevant Licence - Back Compounds and products incorporating the relevant Licence - Back Compounds as an activeingredient, in each case that are targeted at the relevant Collaboration Target or a homologue thereof ; 5.5.1.6 means, in relation to any Collaboration Target, BAYER : ( i)notifies EXSCIENTIA that it has elected not to pursue development and commercialization of Products addressing a certainCollaboration Target ; or ( ii)BAYER terminates this Agreement pursuant to Section 12.2 ; or ( iii)BAYER is in breach of Section 5.3.1.1