The molecule is a zwitterion obtained by transfer of a proton from the 2-hydroxy group to the 1-amino group of 11a-hydroxychlortetracycline; major species at pH 7.3. It is a zwitterion, a member of tetracyclines and an an 11a-hydroxytetracyline zwitterion.
(4S,4aS,5aR,6S,12aR)-2-carbamoyl-7-chloro-4-(dimethylazaniumyl)-6,10,11a,12a-tetrahydroxy-6-methyl-3,11,12-trioxo-4,4a,5,5a-tetrahydrotetracen-1-olate