The molecule is an organic cation obtained by protonation of the four free amino groups of butirosin B; major species at pH 7.3. It is an ammonium ion derivative and an organic cation. It derives from a neamine(4+). It is a conjugate acid of a butirosin B.
[(2R,3S,4R,5R,6R)-5-azaniumyl-6-[(1R,2R,3S,4R,6S)-6-azaniumyl-4-[[(2S)-4-azaniumyl-2-hydroxybutanoyl]amino]-2-[(2S,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]oxy-3-hydroxycyclohexyl]oxy-3,4-dihydroxyoxan-2-yl]methylazanium