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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:methyl L-cysteinate
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Accession:CHEBI:41531 term browser browse the term
Definition:An L-cysteinyl ester resulting from the formal condensation of the carboxylic acid group of L-cysteine with methanol. It is used (as the hydrochloride salt) as a mucolytic for the treatment of respiratory disorders associated with productive cough.
Synonyms:related_synonym: Formula=C4H9NO2S;   InChI=1S/C4H9NO2S/c1-7-4(6)3(5)2-8/h3,8H,2,5H2,1H3/t3-/m0/s1;   InChIKey=MCYHPZGUONZRGO-VKHMYHEASA-N;   O-METHYLCYSTEINE;   SMILES=COC(=O)[C@@H](N)CS;   cysteine methyl ester;   mecisteina;   mecysteine;   mecysteinum;   methyl (R)-cysteinate
 xref: CAS:2485-62-3;   Drug_Central:1653;   KEGG:D08164;   PDBeChem:CMT;   PMID:16027914;   Reaxys:1721306

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Path 1
Term Annotations click to browse term
  CHEBI ontology 19816
    role 19764
      application 19426
        fuel 10814
          methanol 3072
            methyl L-cysteinate 0
              methyl L-cysteinato group 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19816
    subatomic particle 19814
      composite particle 19814
        hadron 19814
          baryon 19814
            nucleon 19814
              atomic nucleus 19814
                atom 19814
                  main group element atom 19702
                    p-block element atom 19702
                      carbon group element atom 19608
                        carbon atom 19597
                          organic molecular entity 19597
                            organic group 18537
                              organic divalent group 18530
                                organodiyl group 18530
                                  carbonyl group 18436
                                    carbonyl compound 18436
                                      carboxylic acid 18114
                                        amino acid 14085
                                          alpha-amino acid 11550
                                            L-alpha-amino acid 11385
                                              serine family amino acid 1878
                                                L-cysteine 1137
                                                  L-cysteine derivative 1126
                                                    L-cysteinyl ester 0
                                                      methyl L-cysteinate 0
                                                        methyl L-cysteinato group 0
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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.