2,4-Pentadienoic acid, 5-(1,3-benzodioxol-5-yl)- (9CI) 5-(1,3-Benzodioxol-5-yl)penta-2,4-dienoic acid 5285-18-7 AI3-41572 EINECS 226-118-4 NSC 129538 Piperic acid Piperic acid (8CI) Piperonic acid