(1-4)-Tetrahydroacenaphthene 2a,3,4,5-Tetrahydroacenaphthene 480-72-8 Acenaphthene, 2a,3,4,5-tetrahydro- Acenaphthylene, 1,2,2a,3,4,5-hexahydro- NSC66171 Tetraphthen Tetraphthene