premise: All written Confidential Information delivered by or on behalf of MCI to the Company pursuant to this Agreement shall be and remain the property of MCI and upon the written request of MCI, the Company shall  (i) promptly return such Confidential Information and shall not retain any copies or other reproductions or extracts thereof,  (ii) destroy or have destroyed all memoranda, notes, reports, analyses, compilations, studies, interpretations, or other documents derived from or containing Confidential Information, and all copies and other reproductions and extracts thereof, and 