The molecule is an aminoglycoside phosphate, an ortho ester and a hygromycin. It is a conjugate base of a 7''-O-phosphohygromycin B(1+).
[2-[(2R,2'R,3'R,3aS,4S,4'S,5'R,6R,7S,7aS)-4-[(1R,2S,3R,5S,6R)-3-amino-2,6-dihydroxy-5-(methylamino)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-aminoethyl] dihydrogen phosphate