definiens: shall mean any and all Antibody(ies ) capable of binding to a specific Existing [COMPANY] Antigen and/or a specific Existing R&D Program Antigen and/or an Her2 / neu Antigen and/or a Mammaglobin Antigen, which Antigen ( each of which is identified on Exhibit l(rr ) attached hereto~ may be amended from time to time upon the mutual agreement of the parties ) w s aiscovered or in­licensed by [COMPANY] in the BC Field, the PC Field, the Tb Field and/or the Her2 / neu­Mammaglobin Field prior to the Effective Date and is not available on an exclusive, co­exclusive or non - exclusive basis for license to SB due to the fact that as of the Execution Date, [COMPANY] has entered into or is currently in negotiations regarding contractual ~ arrangements with respect to such Antigen, as such negotiations are listed on Exhibit 1 ( rr ) attached hereto ; provided, however, that if an Excluded Antibody is not licensed to a Third Party pursuant to a contractual arrangement under negotiation as of the Execution Date, then at the time that [COMPANY] notifies SB in writing that [COMPANY] and such Third Party will not enter a contractual arrangement covering said Excluded AntibodY2 said Excluded Antibody shall become an Available Antibody . I -(ss ) shall mean a Format for use in TDM chosen by SB for the exclusive use of SB and/or SB 's Affiliates and/or SB 's sublicensee(s ) through written notification by SB to [COMPANY] as provided in Section 5(d )