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.
The sulfur analogue of 'hemiacetal'. The class includes compounds of structure R2C(SR')OH or R2C(OR')SH (monothiohemiacetals), or R2C(SR')SH (dithiohemiacetals), R' =/= H .