邻硝基苯乙酮

4-(2-nitrophenyl)-2,4-dioxobutanoic acid ethyl ester

(2R)-2-hydroxy-4-(2-nitrophenyl)-4-oxobutyric acid ethyl ester

(2R)-ethyl 2,4-dihydroxy-4-(2-nitrophenyl)butanoate

3-(S)-amino-1-ethoxycarbonylmethyl-2,3,4,5-tetrahydro-1H-[1]benzazepine-2-one