The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/by/3.0/). For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.
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.