5,10-dimethylidenespiro[2.7]decane

1-bromo-2-methylidenecyclopropane

1-甲基-2-苯基哌啶-4-酮

1-(methylamino)-1-phenylpent-1-en-3-one

trimethyl-(2-methylidene-1-pent-4-enylcyclopropyl)silane