(S)-4-苯基-2-恶唑烷酮

3-(4-氨基苯基)-1,2,4-恶二唑-5(2H)-酮

ethyl 1-(benzenesulfonyl)cyclobutane-1-carboxylate

ethyl hexyl carbonate

ethyl 2-[methyl(phenyl)sulfamoyl]acetate