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 hydroxycalciol that is 25-hydroxyvitamin D3 carrying an additional hydroxy group at position 23 (with 23S-configuration) and an oxo group at position 24. An intermediate in the degradation pathway of 25-OH-vitamin D3.