5-(4-nitrophenoxy)-5-oxopentanoate

5-(4-carboxybutanoylperoxy)-5-oxopentanoic acid

5-[(3,4-Dichlorophenyl)amino]-5-oxopentanoic acid

methyl 5-amino-5-oxopentanoate

甲基6-(二甲氧基磷酰)-5-氧代己酸酯