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...om/Ensemble_for_Chemistry/ChemDraw/ |title=ChemDraw |publisher=PerkinElmer Inc |accessdate=15 February 2013}}</ref><ref name="MarvinAbout">{{cite web |url ...semble_for_Chemistry/ |title=Ensemble for Chemistry |publisher=PerkinElmer Inc |accessdate=15 February 2013}}</ref>, while others like [[Contur Software A