The molecule is conjugate acid of 7''-O-phosphohygromycin B arising from protonation of the three amino groups and deprotonation of the phosphate OH groups; major species at pH 7.3. It is a conjugate acid of a 7''-O-phosphohygromycin B.
[2-[(2R,2'R,3'R,3aS,4S,4'S,5'R,6R,7S,7aS)-4-[(1R,2S,3R,5S,6R)-3-azaniumyl-2,6-dihydroxy-5-(methylazaniumyl)cyclohexyl]oxy-3',4',5',7-tetrahydroxy-6-(hydroxymethyl)spiro[4,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-2,6'-oxane]-2'-yl]-2-azaniumylethyl] phosphate