(1S-(1R*,4E,9S*))-4,11,11-Trimethyl-8-methylenebicyclo(7.2.0)undec-4-ene 10579-93-8 Bicyclo(7.2.0)undec-4-ene, 4,11,11-trimethyl-8-methylene-, (1S,4E,9R)- EINECS 234-173-0