methyl (4S,10aS)-4-[[(2S)-2-acetylsulfanyl-3-phenylpropanoyl]amino]-5-oxo-2,3,4,7,8,9,10,10a-octahydropyrido[2,1-b][1,3]thiazepine-7-carboxylate                                                                                                                                                                                                                                                                                                          生成                                                 
methyl (4S,10aS)-5-oxo-4-[[(2S)-3-phenyl-2-sulfanylpropanoyl]amino]-2,3,4,7,8,9,10,10a-octahydropyrido[2,1-b][1,3]thiazepine-7-carboxylate