1,2,3,4,5,6-Tricyclotrimethylenebenzene 1206-79-7 1H-Trindene, 2,3,4,5,6,7,8,9-octahydro- 2,3,4,5,6,7,8,9-Octahydro-1H-trindene NSC98411 Tricyclotrimethylenebenzene Trindan