120764-68-3 1,2-Pyrazolidinedicarboxylic acid, 4-[[6-(1-hydroxyethyl)-4-methyl-2-[[(4-nitrophenyl)methoxy]carbonyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-en-3-yl]thio]-, bis[(4-nitrophenyl)methyl] ester, [4R-[4α,5β,6β(R*)]]- (9CI)

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