The molecule is an aminoglycoside derived from neomycin and consisting of neamine substituted at position 3 by a 2-acetamido-2-deoxy-alpha-D-glucopyranosyl-(1->3)-beta-D-ribofuranosyl group. It is a conjugate base of a 2'''-acetyl-6'''-hydroxyneomycin C(4+).
N-[(2R,3R,4R,5S,6R)-2-[(2R,3S,4R,5S)-5-[(1R,2R,3S,5R,6S)-3,5-diamino-2-[(2R,3R,4R,5S,6R)-3-amino-6-(aminomethyl)-4,5-dihydroxyoxan-2-yl]oxy-6-hydroxycyclohexyl]oxy-4-hydroxy-2-(hydroxymethyl)oxolan-3-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]acetamide