(1Z,3R)-3-hydroxy-4-methyl-1-(4'-methylphenylthio)-1-nitropent-1-ene

methyl (2R,3S)-2-benzylamino-3-tert-butyldimethylsilyloxy-4-methylpentanoate

(1'S,2R,3R)-3-(1'-hydroxy-2'-methylpropyl)-2-(4''-methylphenylthio)-2-nitrooxirane

methyl (2S,3S)-2-tert-butoxycarbonylamino-3-tert-butyldimethylsilyloxy-4-methylpentanoate

(1'S,2R,3R)-3-(1'-tert-butoxydimethylsilyloxy-2'-methylpropyl)-2-(4''-methylphenylthio)-2-nitrooxirane