2-oxopent-4-enoic acid;2-keto-4-pentenoic acid;20406-62-6;2-Oxopentenoic acid;2-oxo-4-pentenoic acid;AC1L1AGB;AC1Q5BX5;4-Pentenoic acid, 2-oxo-;CHEBI:37318;AR-1E4684;AKOS006376660
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