102640-64-2 103657-08-5 25766-18-1 39388-04-0 39423-40-0 50815-61-7 53569-35-0 56833-58-0 57762-87-5 72510-05-5 Bicyclo(3.1.1)hept-2-ene, 2,6,6-trimethyl-, homopolymer