ethyl (E)-3-(2-fluoro-5-nitrophenyl)prop-2-enoate

ethyl 2-[2-(hydroxymethyl)cyclobutylidene]acetate

(E)-3-(2-hydroxymethyl-cyclobutylidene)-acetic acid ethyl ester

ethyl 3-(4-bromo-3-fluorophenyl)prop-2-enoate

3-甲基戊烯二酸二乙酯