86630-50-4 MCPPF Methylcyclohexyl piperidine perfluoride Piperidine, 1-(1,2,2,3,3,4,5,5,6,6-decafluoro-4-(trifluoromethyl)cyclohexyl)-2,2,3,3,4,4,5,5,6,6-decafluoro-