1,3a,4,6,7,7a-Hexahydro-4,7-methano-5H-inden-5-one 4,7-Methano-5H-inden-5-one, 1,3a,4,6,7,7a-hexahydro- 6316-16-1 Dicyclopentadiene ketone EINECS 228-649-7 NSC 22458 NSC 31987 Tricyclo(5.2.1.02,6)dec-4-en-8-one