(1S-(1alpha,3abeta,4alpha,8abeta))-2-(Decahydro-4,8,8-trimethyl-1,4-methanoazulen-9-ylidene)ethyl acetate 27530-63-8 Acetoxymethyllongifolene EINECS 248-510-4 Ethanol, 2-((1S,3aR,4S,8aR)-decahydro-4,8,8-trimethyl-1,4-methanoazulen-9-ylidene)-, acetate