piperidine
pyridine
4-methoxycinnamaldehyde
malonic acid
diethyl ethylidenemalonate
(E,E)-5-(4-methoxyphenyl)-2,4-pentadienoic acid
5c-(4-methoxy-phenyl)-penta-2t,4-dienoic acid
<3-(4-Methoxy-phenyl)-allyliden>-malonsaeure-dimethylester
<3-(4-Methoxy-phenyl)-allyliden>-malonsaeure-diethylester
5t-(4-methoxy-phenyl)-penta-2t,4-dienoyl chloride