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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.

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Accession:CHEBI:146176 term browser browse the term
Definition:A 6-methoxy-11-methyl-1,3,4,9,10,10a-hexahydro-2H-10,4a-(epiminoethano)phenanthrene in which the stereocenters at positions 4a, 10 and 10a have R-configuration. It is a prodrug of levorphanol and a strong narcotic analgesic, and listed as a schedule II controlled substance.
Synonyms:exact_synonym: (4aR,10R,10aR)-6-methoxy-11-methyl-1,3,4,9,10,10a-hexahydro-2H-10,4a-(epiminoethano)phenanthrene
 related_synonym: (-)-3-methoxy-17-methylmorphinan;   (-)-3-methoxy-N-methylmorphinan;   Formula=C18H25NO;   InChI=1S/C18H25NO/c1-19-10-9-18-8-4-3-5-15(18)17(19)11-13-6-7-14(20-2)12-16(13)18/h6-7,12,15,17H,3-5,8-11H2,1-2H3/t15-,17+,18+/m0/s1;   InChIKey=MKXZASYAUGDDCJ-CGTJXYLNSA-N;   L-3-methoxy-17-methylmorphinan;   L-methorphan;   SMILES=C=1C=2C[C@@H]3[C@]4([C@@](C2C=C(C1)OC)(CCCC4)CCN3C)[H];   levomethorphane;   levomethorphanum;   levometorfano
 xref: CAS:125-70-2;   PMID:16870378;   PMID:26226106;   PMID:28867701;   PMID:29131506;   Wikipedia:Levomethorphan
 cyclic_relationship: is_enantiomer_of CHEBI:4470

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Path 1
Term Annotations click to browse term
  CHEBI ontology 19860
    role 19832
      application 19675
        pro-agent 11550
          prodrug 11310
            levomethorphan 0
              racemethorphan 0
Path 2
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  CHEBI ontology 19860
    subatomic particle 19858
      composite particle 19858
        hadron 19858
          baryon 19858
            nucleon 19858
              atomic nucleus 19858
                atom 19858
                  main group element atom 19804
                    p-block element atom 19804
                      carbon group element atom 19745
                        carbon atom 19741
                          organic molecular entity 19741
                            heteroorganic entity 19494
                              organonitrogen compound 18821
                                alkaloid 7830
                                  isoquinoline alkaloid 1198
                                    morphinane alkaloid 697
                                      6-methoxy-11-methyl-1,3,4,9,10,10a-hexahydro-2H-10,4a-(epiminoethano)phenanthrene 51
                                        levomethorphan 0
                                          racemethorphan 0
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