OOR3, --COY or --NCO, wherein R3 is an alkyl group or an aralkyl group and Y is a halogen atom or N3 ; and n is...http://www.google.com/patents/US5151535?utm_source=gb-gplus-sharePatent US5151535 - Fluorine-containing ??,??-bifunctional compounds and process for their productionAdvanced Patent SearchPublication numberUS5151535 APublication typeGrantApplication numberUS 07/472,864Publication dateSe