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4S)-1-benzoyl-3-(2-ethoxyethoxyl)-4-phenyl-2-azetidinone
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4S)-1-benzoyl-3-(2-ethoxyethoxyl)-4-phenyl-2-azetidinone
(3r,4s)-1-benzoyl-3-(2-ethoxyethoxyl)-4-phenyl-2-azetidinone
2021-12-09