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BPEN.svg Structural formula of the chemical compound bis phenylethynyl naphthacene BPEN Strukturformel der chemischen Verbindung Bis phenylethinyl naphthacen oder Bis phenylethinyl tetracen BPEN Bis phenylethynyl naphthacen Bis phenylethynyl tetracen own Yikrazuul File bis phenylethynyl naphthacene PDchem BPEN