Doxycycline

Doxycycline EP Impurity A Doxycycline Impurity A :

6-Epi Doxycycline HCl ; (4S,4aR,5S,5aR,6S,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 HCl ; CAS : 3219-99-6 (base) ; 41411-66-9 (HCl) ;

C22H24N2O8 (base) ; Mol. Wt.: 444.43 ; C22H25ClN2O8 (HCl salt) ; Mol. Wt.: 480.90 ;
Doxycycline EP Impurity B Doxycycline Impurity B:

(4S,4aR,5S,5aR,12aS)-4-(Dimethylamino)-3,5,10,12,12a-pentahydroxy-6-methylene-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide HCl ; CAS : 914-00-1 (free base) ; 3963-95-9 (HCl) ;

C22H22N2O8 (base) ; Mol. Wt.: 442.42 ; C22H23ClN2O8 (base) ; Mol. Wt.: 478.88 ;
Doxycycline EP Impurity C Doxycycline Impurity C :

4-Epi Doxycycline ; (4R,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 ; CAS : 6543-77-7 ; C22H24N2O8 ; Mol. Wt.: 444.43 ;
Doxycycline EP Impurity D Doxycycline Impurity D:

4-Epi 6-Epi Doxycycline ; (4R,4aR,5S,5aR,6S,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 ; CAS : 97583-08-9 ; C22H24N2O8 ;
Mol. Wt.: 444.43 ;
Doxycycline EP Impurity E Doxycycline  Impurity E:

Oxytetracycline ; (4S,4aR,5S,5aR,6S,12aS) -4-(dimethylamino)-3,5,6,10,11,12a-hexahydroxy -6-methyl-1,12-dioxo-1,4,4a,5,5a,6,12,12a-octahydrotetracene -2-carboxamide ; CAS : 79-57-2 ; 6153-64-6 (Dihydrate) ; C22H24N2O9 ;
Mol. Wt.: 460.43 ;
Doxycycline EP Impurity F Doxycycline  Impurity F :

2-Acetyl-2-Decarbamoyl Doxycycline ; (4S,4aR,5S,5aR,6R,12aS)-2-Acetyl-4-(dimethylamino)-3,5,10,12,12a-pentahydroxy-6-methyl-4a,5a,6,12a-tetrahydrotetracene-1,11(4H,5H)-dione ; CAS : 6542-44-5 ; C23H25NO8 ;
Mol. Wt.: 443.45 ;