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.
An oligopeptide comprising of (4S)-1-methyl-2,6-dioxohexahydropyrimidine-4-carboxylic acid, L-histidine and L-prolinamide joined in sequence by peptide linkages. It is a thyrotropin-releasing hormone (TRH) analog. Its tetrahydrate form is approved in Japan for the treatment of spinal muscular atrophy.