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Desdimethylaminotetracyclines and process

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1. PROCESS FOR THE PREPARATION OF A MICROBIOLOGICALLY ACTIVE PRODUCT SELECTED FROM THE GROUP CONSISTING OF DESDIMETHYLAMINOTETRACYCLINE, DESDIMETHYLAMINOCHLORTETRACYCLINE, AND DESDIMETHYLAMINO-4-OXYTETRACYCLINE WHICH COMPRISES CONTACTING A TETRACYCLINE ANTIBIOTIC SELECTED FROM THE GROUP CONSISTING OF TETRACYCLINE, CHLORTETRACYCLINE, AND OXYTETRACYCLINE WITH METALLIC ZINC IN A MILDLY ACIDIC MEDIUM AT A TEMPERATURE OF FROM ABOUT 0*C. TO ABOUT 40*C. FOR A TIME OF FROM ABOUT 2 TO ABOUT 10 HOURS, THE CONCENTRATON OF TETRACYCLINE ANTIBIOTIC BASED ON THE WEIGHT OF ACIDIC MEDIUM BEING FROM ABOUT 1 TO ABOUT 20 PERCENT BY WEIGHT, THERE BEING AT LEAST 1/2 PART BY WEIGHT OF ZINC PER PART BY WEIGHT OF TETRACYCLIEN ANTIOBIOTIC, AND RECOVERING RESULTING MICROBIOLOGICALLY ACTIVE PRODUCT.
4. A BIOLOGICALLY ACTIVE DESDIMETHYLAMINOTETRACYCLINE COMPOUND CHOSEN FROM THE GROUP CONSISTING OF DESEIMETHYLAMINOCHLORTETRACYCLINE AND DESDIMETHYLAMINOTETRACYCLINE.
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