The molecule is an organic anion that is the major structure of chlortetracycline at pH 7.3 (according to Marvin v 6.2.0.). It is a conjugate base of a chlortetracycline.
(4S,4aS,5aS,6S,12aR)-2-carbamoyl-7-chloro-4-(dimethylazaniumyl)-6,10,12a-trihydroxy-6-methyl-3,12-dioxo-4,4a,5,5a-tetrahydrotetracene-1,11-diolate