Synonyms: 4,7-Methano-1H-indene,3a,4,7,7a-tetrahydro-, (3aa,4a,7a,7aa)-; 4,7-Methanoindene, 3aa,4b,7b,7aa-tetrahydro-(8CI); endo-3a,4,7,7a-Tetrahydro-4,7-methanoindene; endo-Cyclopentadiene dimer;endo-Dicyclopentadiene; endo-Octahydro-4,7-methano-1H-indene;endo-Tricyclo[5.2.1.02,6]deca-3,8-diene