(2S,3R,4S,5S)-3-((1S,2S)-1-Benzyloxy-2-methyl-butyl)-5-cyclohexyl-4-nitro-pyrrolidine-2-carboxylic acid methyl ester

(2S3S)-2-羟基-3-甲基戊酸

(E)-(cyclohexylmethylene-amino)-acetic acid methyl ester