doxycycline(4S,4AR,5S,5AR,6R,12AS)-4-(DIMETHYLAMINO)-3,5,10,12,12A-PENTAHYDROXY-6-METHYL-1,11-DIOXO-1,4,4A,5,5A,6,11,12A-OCTAHYDROTETRACENE-2-CARBOXAMIDE5-hydroxy-alpha-6-deoxytetracycline6alpha-deoxy-5-oxytetracyclineDoxycyclinDoxycyclinedoxycycline (anhydrous)