The molecule is an anthracycline cation that is the conjugate acid of doxorubicin, arising from protonation of the amino group; major species at pH 7.3. It is a conjugate acid of a doxorubicin.
[(2S,3S,4S,6R)-3-hydroxy-2-methyl-6-[[(1S,3S)-3,5,12-trihydroxy-3-(2-hydroxyacetyl)-10-methoxy-6,11-dioxo-2,4-dihydro-1H-tetracen-1-yl]oxy]oxan-4-yl]azanium