Synonyms: Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane,(2-bicyclo[2.2.1]hept-5-en-2-ylethyl)heptacyclopentyl- (9CI);1-[2-(Norbornen-5-yl)ethyl]-3,5,7,9,11,13,15-heptacyclopentylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane;NB 1020; NorbornenylethylCyclopentyl-POSS