3-Buten-2-one, 4-(4-methoxyphenyl)- 3-Buten-2-one, 4-(p-methoxyphenyl)- 4-Methoxybenzylideneacetone 943-88-4 Methyl p-methoxystyryl ketone NSC31752 p-Anisilidenacetone p-Methoxybenzalacetone p-Methoxybenzylideneacetone