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 calcitriol which has undergone formal oxidative coupling at positions 20 and 23 to the hydroxy group and methyl group, respectively, of methanol to afford the corresponding oxolane ring (the 20S,23S stereoisomer). It is a superagonist of the vitamin D nuclear receptor in vitro, but is as calcemic in vivo as the natural ligand.