ChEBI: A monocarboxylic acid that is (E)-penta-2,4-dienoic acid substituted by a 1,3-benzodioxol-5-yl group at position 5. It has been isolated from black pepper (Piper nigrum).
Purification Methods
Crystallise the acid from EtOH. It turns yellow in light. It sublimes with partial decomposition. It has UV max 340nm (MeOH). [Beilstein 19 H 281, 19 II 30, 19 III/IV 3565.]