4,6,6-Trimethylbicyclo(3.1.1)hept-3-en-2-one 80-57-9 AI3-23127 Bicyclo(3.1.1)hept-3-en-2-one, 4,6,6-trimethyl- EINECS 201-292-4 EPA Pesticide Chemical Code 128986 Verbenone