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Processes for (3S,4R)-3-[1(R)-t-butyl-dimethylsilyloxy)-ethyl]-4-[1-oxo-3-thiolanylthi o(thiocarbonyl)thio]azetidin-2-ones and intermediates therefor

US Patent 5075439 · Granted Dec 24, 1991

Estimated economic value: $68,436,000

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