Synonyms: 2,4-Pentadienoicacid, 4-hydroxy-, g-lactone (7CI);Protoanemonin (6CI);2,4-Pentadien-4-olide;4-Hydroxy-2,4-pentadienoic acid lactone;4-Hydroxy-2,4-pentadienoic acid g-lactone;5-Methylene-2(5H)-furanone;5-Methylene-2,5-dihydrofuran-2-one;5-Methylene-2-oxodihydrofuran;Isomycin;Protoanemonene;g-Methylenebutenolide;