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Patent Biological transformation of anhydrotetracyclines to 6-deoxytetracyclines Jan 01, 1974 FR 2187301
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Patent Catalytic dehalogenation, alone or with simultaneous reduction, of 11a-halo-6-deoxy-6-demethyl, 6-methylenetetracyclines by hydrazine Jan 01, 1973 GB 1360006