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The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at The data is made available under the Creative Commons License (CC 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.

Term:Lewis base
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Accession:CHEBI:39144 term browser browse the term
Definition:A molecular entity able to provide a pair of electrons and thus capable of forming a covalent bond with an electron-pair acceptor (Lewis acid), thereby producing a Lewis adduct.
Synonyms:related_synonym: base de Lewis;   donneur d'une paire d'electrons;   electron donor

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  CHEBI ontology 0
    role 0
      chemical role 0
        base 0
          Lewis base 0
            methoxyethane + 0
            nucleophilic reagent + 0
            pyrimidin-2-ol 0
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