The molecule is a methyl glycoside that is beta-D-Gal-(1->4)-[beta-D-Gal-(1->4)-beta-D-Glc-(1->6)]-beta-D-GlcNAc in which the hydroxy group at position 6 of the galactose residue linked to O-4 of the reducing end glucosyl residue is replaced by an ammoniumyl group and the hydroxy group at the reducing-end anomeric centre is methylated. It contains an azaniumyl group. It derives from a beta-D-Galp-(1->4)-[beta-D-Galp-(1->4)-beta-D-Glcp-(1->6)]-beta-D-GlcpNAc.
[(2R,3R,4S,5R,6S)-6-[(2R,3S,4R,5R,6R)-5-acetamido-2-[[(2R,3R,4R,5S,6R)-3,4-dihydroxy-6-(hydroxymethyl)-5-[(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxymethyl]-4-hydroxy-6-methoxyoxan-3-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methylazanium