definiens: shall mean any compound o r mixture or composition of matter which is derived by or under authority of TDCC or its Affili ates from a Library Compound . As used in this Agree ment, a compound, mixture or composition of matter shall be deemed to have been a Library Compo und if it ( i ) results from a chemical synthesis program based on a Library Compound or ( ii ) results from t he use of Program Technology relating to one or more Library Compounds, or ( iii ) is within the scope of patent c laims of any patent or patent application where the inventiv e feature relates to one or more Library Compounds or compounds, mixtures or compositions of matter descr ibed in ( i ) or ( ii ) above . Derivative Compound shal l also include a compound, mixture or composition of matte r that is derived, as described in ( i ) through ( iii ) above, from another Derivative Compound . Notwithstanding t he foregoing, a compound, mixture or composition of matter other than a Library Compound that is first identified as an Olefin Polymer or as a catalyst us eful in the synthesis of an Olefin Polymer more than five ( 5 ) y ears after the end of the Research Program shall no t be deemed a Derivative Compound . It is understood that compounds -2- developed independently by TDCC without the use of Library Compounds, Confidential Information of Symy x, or Program Technology, shall not be deemed to be a Derivative Compound