Synonyms: 4,7-Methano-1H-indene, 3a,4,7,7a-tetrahydro-, polymer with 1,3-cyclopentadiene, cyclopentene, 1-hexene, 2-methyl-2-butene and 1,3-pentadiene;cyclopentene, 1-hexene, 2-methyl-2-butene and 1,3-pentadiene;mixed pentenes/ hexene/ 2-methyl-2-butene polymer