definiens: means ( 1 ) VX-680, ( 2 ) Existing Compounds, ( 3 ) Merc k AK Compounds, and ( 4 ) any small molecule chemical compound that is owned or C ontrolled by [COMPANY], or jointly by [COMPANY] and [COMPANY], including salts thereof, ( i ) whose [ * * * ] act ivity is the inhibition of one or more Aurora kinas es [ * * * ], and ( ii ) is synthesized or tested for Aurora kinase activity [ * * * ] ( including by screening ) by [COMPANY] ( whether solely by [COMPANY] or in collaboratio n with [COMPANY] ) during the Research Program Term or during the [ * * * ] period immediately following the e xpiration of the Research Program Term . For the avoidance of doubt, shall not include a ny compound that has greater activity against a non - Aurora kinase target than its activity against an Aurora kinase, or any compound that has greater activity against a non - kinase target than its activ ity against an Aurora kinase