16725-82-9 3,7,7-Trimethyl-4-acetylbicyclo(4.1.0)hept-2-ene 3608-11-5 4-Acetyl-2-carene Acetylcarene Car-2-en-4-yl methyl ketone EINECS 222-771-4 Ethanone, 1-(4,7,7-trimethylbicyclo(4.1.0)hept-4-en-3-yl)-