1-(10,10-Dimethyl-2,6-bis(methylene)bicyclo(7.2.0)undec-5-yl)ethan-1-one 55790-53-9 EINECS 259-819-9 Ethanone, 1-(10,10-dimethyl-2,6-bis(methylene)bicyclo(7.2.0)undec-5-yl)-