Maleic-anhydride of 2-Phenyl-1,3-butadione;cis-Butenedial;maleic anhydride adduct of 2-Phenyl-1,3-butadien;maleic dialdehyde;5-phenyl-3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione;(E)-2-BUTENEDIAL;cis-2-Butene-1,4-dial;4-Phenylcyclohex-4-ene-1,2-carboxylic anhydride;cis-2-butendial;Z-2-butendial;