2 3 5 9-tetramethylbicyclo 4.4.0 decane July 8, 2019 16 32 64 128 2 3 5 9 tetramethylbicyclo 4.4 0 decane Bicyclo 7.2.0 undec-4-ene 4 11 11-trimethyl-8-methylene-
