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.
It is a thyroid hormone replacement medication which works by supplying the thyroid hormone normally produced by the body. It is used to treat the symptoms of hypothyroidism (a condition where the thyroid gland does not produce enough thyroid hormone) and is also used to treat goiter (enlarged thyroid gland). Desiccated thyroid extract is made from dried thyroid glands of animals, specifically pigs.