trans-5-Benzoyloxy-4-oxo-penten-(2)-saeure

(5-oxo-2,5-dihydrofuran-2-yl)methyl benzoate

(2-methoxy-5-oxofuran-2-yl)methyl benzoate

(Z)-5-methoxy-2,5-dioxopent-3-en-1-yl benzoate

4-氯-2-氟-5-硝基-苯甲酸甲酯