Similar names: 4,7-Methanoindene, 3a,4,7,7a-tetrahydro- (7CI,8CI); 3a,4,7,7a-Tetrahydro-4,7-methano-1H-indene; 3a,4,7,7a-Tetrahydro-4,7-methanoindene; 3a,4,7,7a-Tetrahydro-4,7-methanoindene; Bicyclopentadiene; Biscyclopentadiene; Cyclopentadiene dimer; DCPD; DCPD 103; Dicyclopentadiene; NSC 7352; Prometa XP 100; Tricyclo[4.3.0.12,5]deca-3,7-diene; Tricyclo[4.3.1.02,5]deca-3,7-diene; Tricyclo[5.2.1.02,6]deca-3,8-diene; Tricyclodecadiene; Ultrene; Ultrene 97; Ultrene 99; Ultrene DCPD