OTC, tm5, GEOMYCIN, TOXINAL, otetryn, (4S,4aR,5S,5aR,6S,12aS)-4-dimethylamino-1,4,4a,5,5a,6,11,12a-octahydro-3,5,6,10,12,12a-hexahydroxy-6-methyl-1,11-dioxonaphthacene-2-carboxamide hydrochloride, terramycin hydrochloride, Oxycline, oxytetracycline HCl, Oxytetracycline Hydrochloride,Can be Used as Secondary Standard, oxlopar, (4S,4aR,5S,5aR,6S,12aS)-4-(dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,5,6,10,12,12a-hexahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamide hydrochloride (1:1), oxytetracyclin hydrochloride, mepatar, Oxytetracycline hydrochloride, engemycin