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  • [1S[1α,3(R*),5α,6α]]-3-[2-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-1-phenylethyl]-8-methyl-2,4-dioxo-3,8-diazabicyclo[3.2.1]octane-6-carboxylic acid ethyl ester

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