3-amino-3-phenylhydrazono-propionic acid ethyl ester

1-phenyl-3-ethoxycarbonylpyrazol-5-one

Butanedioic acid, 2-(2-phenylhydrazinylidene)-, 1,4-diethyl ester

苯肼

ethyl 3-amino-3-ethoxyprop-2-enoate