4-[Ethyl(methyl)amino]-1,4,4a,5,5a,6,11,12a-octahydro-3,5,6,10,12,12a-hexahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamide;4-N-Demethyl-4-N-ethyloxytetracycline;N-Ethyloxytetracycline
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