The molecule is an organic anion that is the conjugate base of minocycline, obtained by deprotonation of the two enolic hydroxy groups and protonation of the non-aromatic tertiary amino group. It is a conjugate base of a minocycline and a minocycline zwitterion.
(4S,4aS,5aR,12aR)-2-carbamoyl-7-(dimethylamino)-4-(dimethylazaniumyl)-10,12a-dihydroxy-3,12-dioxo-4a,5,5a,6-tetrahydro-4H-tetracene-1,11-diolate