2-(2-p-Nitrobenzyloxycarbonylimino-hexahydropyrimidine-5-yl)thio-2-methylnitropropane 、 (5R,6S)-6-((R)-1-Hydroxy-ethyl)-3-[2-(4-nitro-benzyloxycarbonylamino)-ethanesulfinyl]-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 生成 (4-nitrophenyl)methyl (5R,6S)-6-[(1R)-1-hydroxyethyl]-3-[[2-[(4-nitrophenyl)methoxycarbonylamino]-1,4,5,6-tetrahydropyrimidin-5-yl]sulfanyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate