Synonyms: 1,3-Cyclopentadiene,5-isopropylidene- (8CI); Fulvene, 6,6-dimethyl- (6CI);5-Isopropylidene-1,3-cyclopentadiene; 5-Isopropylidenecyclopentadiene;6,6-Dimethylfulvene; 6,6-Dimethylpentafulvene; 6,6'-Dimethylfulvene;Dimethylfulvene; Isopropylidenecyclopentadiene; NSC 132350