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 polysaccharide derivative that consists of a backbone of alpha-D-glucosyl-(1->4)-5,7-diacetyl-alpha-D-neuraminosyl repeating units, joined together by glycosidic linkages between position 2 of the diacetylneuraminosyl residues and position 6 of the glucosyl residues. The depicted structure is representative and shows the repeating unit, which is variably O-acylated at the 7-position of the neuraminosyl residues.