2-[1-(5-Ethyl-3-methoxy-4-methoxymethoxy-naphthalen-1-yl)-meth-(Z)-ylidene]-butyric acid ethyl ester

(E)-2-Benzyl-3-(5-ethyl-3-methoxy-4-methoxymethoxy-naphthalen-1-yl)-acrylic acid

(E)-3-(5-Ethyl-3-methoxy-4-methoxymethoxy-naphthalen-1-yl)-hept-2-enoic acid ethyl ester