26447-17-6 26472-00-4 3a,4,7,7a-Tetrahydrodimethyl-4,7-methano-1H-indene 3a,4,7,7a-Tetrahydrodimethyl-4,7-methanoindene 4,7-METHANO-1H-INDENE, 3A,4,7,7A-TETRAHYDRODIMETHYL- 4,7-Methanoindene, 3a,4,7,7a-tetrahydrodimethyl- Bis(methylcyclopentadiene) Dimethyldicyclopentadiene EINECS 247-724-5 Methylcyclopentadiene dimer