(2E,4Z)-2-hydroxy-6-oxohepta-2,4-dienoate (2E,4Z)-2-hydroxy-6-oxo-hepta-2,4-dienoate (2E,4Z)-2-hydroxy-6-keto-hepta-2,4-dienoate c0284 cis,cis-2-Hydroxy-6-oxohept-2,4-dienoate