429665-66-7

1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid,6-[(1R)-1-hydroxyethyl]-3-[[1-[4-[[[(1S)-1-(hydroxymethyl)-2-methylpropyl]amino]carbonyl]-2-thiazolyl]-3-azetidinyl]thio]-4-methyl-7-oxo-,(4-nitrophenyl)methyl ester, (4R,5S,6S)-