2,4-Pentadienoic acid, 5-hydroxy-5-(3,4-(methylenedioxy)phenyl)-, delta-lactone 2H-Pyran-2-one, 6-(1,3-benzodioxol-5-yl)- (9CI) 2H-Pyran-2-one, 6-(3,4-(methylenedioxy)phenyl)- 4-19-00-05044 (Beilstein Handbook Reference) 6-(3,4-(Methylenedioxy)phenyl)-2H-pyran-2-one 91-89-4 BRN 0190940 Paracotoin