(Z)-2-Acetoxy-3,3',4'-trimethoxystilbene

The crystal structure determination demonstrates unambiguously that the title compound, 2-[(Z)-3,4-dimethoxyphenylethenyl]-6-methoxyphenyl acetate, C₁₉H₂₀O₅, has the (Z)-configuration. The title compound was prepared by decarboxylation of (E)-3-(2-acetoxy-3-methoxyphenyl)-2-(3,4-dimethoxyphenyl)propenoic acid; this compound was in turn obtained by condensation of 2-acetoxy-3-methoxybenzaldehyde with (3,4-dimethoxyphenyl)acetic acid. ¹H NMR data for the title compound and the isomeric )-2-acetoxy-3,3',4'-trimethoxystilbene are reported.

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