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C07D503/00—Heterocyclic compounds containing 4-oxa-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula:, e.g. oxapenicillins, clavulanic acid derivatives; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
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Organic Chemistry
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Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems
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AR26408976A1975-08-201976-07-27Un procedimiento para preparar una sal sodica o potasicas solida del acido clavulanico
AR209378A1
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