Ontology mapping
- Primary identifier
-
CHEBI:16199 - Ontology label
- urea
- kg-microbe node
CHEBI:16199
Nutritional roles
- Role
- NITROGEN_SOURCE
- Confidence
- 0.6
- Evidence
- Reference type
- COMPUTATIONAL_PREDICTION
- Reference text
- Assigned by in-session Claude reasoning (no external API)
- Curator note
- Provisional in-session LLM role assignment; review recommended.
Synonyms (15)
| Synonym | Type | Source | Occurrences |
|---|---|---|---|
| Cross-references: KEGG:urea | RAW_TEXT | CultureMech | |
| Properties: Defined component, Organic compound, Simple component | RAW_TEXT | CultureMech | |
| Properties: Defined component, Simple component, Organic compound | RAW_TEXT | CultureMech | |
| Properties: Organic compound, Simple component, Defined component | RAW_TEXT | CultureMech | |
| Properties: Simple component, Defined component, Organic compound | RAW_TEXT | CultureMech | |
| 1728 | EXACT_SYNONYM | kg_microbe | |
| Carbamide | EXACT_SYNONYM | kg_microbe | |
| E927b | EXACT_SYNONYM | kg_microbe | |
| H2NC(O)NH2 | EXACT_SYNONYM | kg_microbe | |
| Harnstoff | EXACT_SYNONYM | kg_microbe | |
| Karbamid | EXACT_SYNONYM | kg_microbe | |
| carbonyldiamide | EXACT_SYNONYM | kg_microbe | |
| ur | EXACT_SYNONYM | kg_microbe | |
| uree | EXACT_SYNONYM | kg_microbe | |
| Urea (Sigma U5218) | CATALOG_VARIANT | culturemech:output/ingredient_occurrences.tsv |
Rejected enrichment labels (1)
Provenance-only candidates: these are not synonyms and do not resolve to this record.
| Rejected label | Disposition | Source | Occurrences |
|---|---|---|---|
| hydrolysis: urea | REJECTED_LABEL | kg_microbe |
Chemical properties
- Cas rn
- 57-13-6
- Data source
- PubChem API
- Retrieval date
- 2026-04-05T19:54:12.670520+00:00
- Molecular formula
- CH4N2O
- Inchi
- InChI=1S/CH4N2O/c2-1(3)4/h(H4,2,3,4)
- Smiles
- NC(N)=O
Evidence (1)
DATABASE_MATCH
via CultureMech
Imported from CultureMech pipeline, quality=DIRECT_MATCH
Occurrence statistics
- Total occurrences
- 72
- Distinct media
- 71
Curation history
| Timestamp | Curator | Action | New status | Changes |
|---|---|---|---|---|
| 2026-03-09T06:54:18.022301+00:00 | import_from_culturemech | IMPORTED | MAPPED | Initial import from CultureMech pipeline |
| 2026-04-05T19:54:12.670571+00:00 | fetch_cas_rn_from_pubchem | ADDED_CAS_RN | MAPPED | Added CAS-RN:57-13-6 from PubChem API via name lookup (Urea) |
| 2026-04-18T00:00:00+00:00 | cbclaw_kg_microbe_sweep LLM | ADDED_SYNONYMS | MAPPED | Added 10 synonyms from kg-microbe P4.4 enrichment: 1728, Carbamide, E927b, H2NC(O)NH2, Harnstoff, ... (5 more) |
| 2026-05-01T07:35:36.811316+00:00 | auto_classify_ingredient_type | AUTO_CLASSIFY_INGREDIENT_TYPE | set ingredient_type=SINGLE_INGREDIENT (CHEBI primary) | |
| 2026-05-01T08:08:32.896740+00:00 | auto_classify_ingredient_type | AUTO_BACKFILL_CHEBI_CHEMISTRY | molecular_formula=CH4N2O; inchi=InChI=1S/CH4N2O/c2-1(3)4/h(H4,2,3,4); smiles=NC(N)=O | |
| 2026-05-02T03:12:19.122021+00:00 | auto_classify_ingredient_type | AUTO_CLASSIFY_INGREDIENT_TYPE | set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula)) | |
| 2026-06-09T04:56:30.248294+00:00 | claude_in_session_curation | ANNOTATED | Added media role: NITROGEN_SOURCE (confidence: 0.60) | |
| 2026-06-09T05:23:46.848166+00:00 | correct_stale_ontology_labels.py | CORRECTED | ontology_label 'Urea' -> 'urea': synced to canonical CHEBI label (preferred_term 'Urea' unchanged). | |
| 2026-07-20T00:00:00+00:00 | migrate_media_roles_to_facets | ANNOTATED | Migrated legacy media_roles to role facets (#128): NITROGEN_SOURCE -> nutritional_roles.NITROGEN_SOURCE | |
| 2026-08-27T03:16:39.520049+00:00 | refresh_occurrence_statistics | CORRECTED | occurrence_statistics 50/51 -> 71/72 (media_count/total_occurrences), derived from distinct CultureMech recipe ids in the #337 occurrence table. The prior values came from the importer retired in #453, whose media_count counted a list truncated to 50 examples (#449). [source=ingredient_occurrences.tsv culturemech_rev=15a4da5c08 rows=194137 distinct_recipes=15257] | |
| 2026-08-30T04:48:06.233536+00:00 | claude_culturemech_alias_backfill | ADDED_SYNONYMS | Added 1 CultureMech recipe surface form(s) that folded onto this record's published label but were absent from MIM's label index, so CultureMech could not resolve them: 'Urea (Sigma U5218)' (x1 CultureMech mentions). Source: culturemech:output/ingredient_occurrences.tsv. | |
| 2026-09-22T06:14:49.563933+00:00 | claude LLM | REJECTED_TRAIT_SYNONYMS | Retyped activity/assay phrases as provenance-only REJECTED_LABEL because they describe a process or organism trait, not an ingredient name (#703): 'hydrolysis: urea'. Preserved original text and source metadata. No identity, mapping, role, or remaining-synonym claim was adjudicated. |