ethyl 4-bromo-3-methylcrotonate
triphenylphosphine
ethyl 3-methylbut-2-enoate
Ethyl-3-methyl-5-?-tolylpenta-2,4-dienoat
Ethyl-3-methyl-5-?-tolylpenta-2,4-dienoat
2-Methyl-cyclohexa-1,3-dienecarboxylic acid ethyl ester
2-methyl-4-oxo-cyclopent-2-enecarboxylic acid ethyl ester
(2E,4E)-3-Methyl-5-(2,4,6-trimethoxy-phenyl)-penta-2,4-dienoic acid