Synonyms: Hydrocarbons, C4, 1,3-butadiene-free, polymd., pentaisobutylene fraction, hydrogenated;2,2,4,4,6,6,8,8,10-Nonamethylundecane;hydrocarbons, c4, 1,3-butadiene-free, polymd., pentaisobutylene fraction, hydro;Methylnonadecane;C4-hydrocarbons, polymerised/pentaisobutylene,hydrogenated