14206-58-7(4-差向土霉素)
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Oxytetracycline EP Impurity A/4-epi-Oxytetracycline/(4R,4aR,5S,5aR,6S,12aS)-4-(Dimethylamino)-3,5,6,10,12,12a-hexahydroxy-6-methyl- 1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide
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