(5R)-3-[[2-(Acetylamino)ethyl]thio]-6β-[(S)-1-hydroxyethyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid;Antbiotic PS-3B;Antibiotic 890A3;Antibiotic MM-22381;Epithienamycin C;MM-22381
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