2-Propenoic acid, 3-(1,3-benzodioxol-5-yl)- 2373-80-0 3,4-(Methylenedioxy)cinnamic acid 3,4-Methylenedioxybenzene-3-acrylic acid 3-(3,4-Methylenedioxyphenyl)propenoic acid Acetic acid, piperonylidene- Cinnamic acid, 3,4-(methylenedioxy)- Cinnamic acid, 3,4-[methylenebis(oxy)]- NSC5953