definiens: means a compound, and /or a Derivative of a CART Identified Compound, that has been identified as a modulator of a [COMPANY] Activated Receptor provided to [COMPANY] by Arena he reunder, provided, however, that for the purposes of this Agreement the followi ng specific compounds shall be excluded from the scope of the CART Identified C ompound : * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * and Derivatives of * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * and any compound to be identified by [COMPANY] as a back -up compound of * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * by providing notice to Arena b efore completion of [COMPANY] Activities described in the Section 2.4