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  • ((2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-2-{(1R,4R)-4-[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-2-oxo-cyclohexyl}-4-oxo-azetidin-1-yl)-oxo-acetic acid benzyl ester

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