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-carboxamide; (4S,4aR,5S,5aR,6R,12aS)-4-(Dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,5,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamide (USP);
Doxycycline EP Impurity A - (4S,4aR,5S,5aR,6S,12aS)-4-(dimethylamino)-3,5,10,12,12apentahydroxy-6-methyl-1,11-dioxo-1,4,4a,5,5a,6,11,12aoctahydrotetracene-2-carboxamide ; 6-Epidoxycycline; Doxycycline USP Related Compound A ;
Doxycycline EP Impurity B - (4S,4aR,5S,5aR,12aS)-4-(dimethylamino)-3,5,10,12,12a-pentahydroxy-6-methylene-1,11-dioxo1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide ;
Doxycycline EP Impurity C - (4R,4aR,5S,5aR,6R,12aS)-4-(dimethylamino)-3,5,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide(4-epidoxycycline) ;
Doxycycline EP Impurity F - (4S,4aR,5S,5aR,6R,12aS)-2-acetyl-4-(dimethylamino)-3,5,10,12,12a-pentahydroxy-6-methyl-4a,5a,6,12atetrahydrotetracene-1,11(4H,5H)-dione (2-acetyl-2-decarbamoyldoxycycline) ;