3-ethenyl-2,2,3-trimethylcyclobutan-1-one;2,2,3-trimethyl-3-vinyl-cyclobutan-1-one;2,2,3-trimethyl-3-vinyl-1-cyclobutanone;3-ethenyl-2,2,3-trimethyl-cyclobutan-1-one
3-ethenyl-2,2,3-trimethylcyclobutan-1-one