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2-Oxo-1-imidazolidinecarbonyl chloride

2-Oxohexamethylenimine

1-(1-Oxohexadecyl)-L-proline

N-(2-Oxoethyl)phthalimide

3-Oxocyclopentanecarboxylic acid

2-(2-Oxocyclohexyl)-2-hydroxy-acetic acid methyl ester

N-(4-Oxocyclohexyl)acetamide

3-Oxocyclobutanecarboxylic acid

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