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 linear tetrasaccharide consisting of two beta-D-mannose residues, an alpha-L-rhamnose residue and a beta-D-glucose residue (at the reducing end), joined by sequential (1->3), (1->3) and (1->3) linkages.