Methacycline HCl (PhysioMycine) Rondomycin hydrochloride 6-Methyleneoxytetracycline hydrochloride, Metacycline hydrochloride, LondoMycin (4S,4aR,5S,5aR,12aS)- 4-(dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,5,10,12,12a-pentahydroxy-6-methylene-1,11-dioxo-2-naphthacenecarboxamide, hydrochloride (1:1) Methacycline hydrochloride Solution, 100ppm Hydrochloric acid methacycline 6-DEMETHYL-6-DEOXY-6-METHYLENEOXYTETRACYCLINE MONOHYDROCHLORIDE 6-DEMETHYL-6-DEOXY-6-METHYLENEOXYTETRACYCLNE HYDROCHLORIDE