6-methyl-3-methylene-hept-5-en-2-one

3-methyl-2-butenal dimethylhydrazone

2-isopropenyl-5-methyl-4-hexenal dimethylhydrazone

5-Methyl-2-(1'-methylethyliden)-4-hexensaeure-ethylester

methyl-3 N-phenyl butene-3 imidothioate de methyle