(6R,7S)-3-ethoxycarbonyl-7-[[(2Z)-2-methoxyimino-2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-1,3-thiazol-4-yl]acetyl]amino]-8-oxo-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid   、                                                                                      
1-chloroethyl 3-morpholinopropylcarbonate                                                                                                                                                                                                                                                                                                          生成                                                 3-O-ethyl 2-O-[1-(3-morpholin-4-ylpropoxycarbonyloxy)ethyl] (6R,7S)-7-[[(2Z)-2-methoxyimino-2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-1,3-thiazol-4-yl]acetyl]amino]-8-oxo-1-azabicyclo[4.2.0]oct-2-ene-2,3-dicarboxylate