Ethyl (3S)-3-(1-benzylethylphosphonomethylcyclopentane-1-carbonylamino)-2,3,4,5-tetrahydro-2-oxo-1H-1-benzazepine-1-acetate                                                                                                                                                              在
                                                                                                                                         
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Ethyl (3S)-3-(1-ethylphosphonomethylcyclopentane-1-carbonylamino)-2,3,4,5-tetrahydro-2-oxo-1H-1-benzazepine-1-acetate