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C07D499/00—Heterocyclic compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula:, e.g. penicillins, penems; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
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HU71KO2699A1970-02-181971-02-17Process for production of subsituated 1-oxo-2,2-dimethil-6-amin-penam-carbonic acid silil esthers
HU170715B
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