N-Acetyl-D-glucosamine

CHEBI:506227 chemically defined MAPPED CHEBI EXACT_MATCH

Ontology mapping

Primary identifier
CHEBI:506227
Ontology label
N-acetyl-D-glucosamine
kg-microbe node
CHEBI:506227

Nutritional roles

Synonyms (8)

SynonymTypeSourceOccurrences
Role: Carbon source; Properties: Defined component, Organic compound, Simple component RAW_TEXT CultureMech
Role: Carbon source; Properties: Organic compound, Simple component, Defined component RAW_TEXT CultureMech
2-acetamido-2-deoxy-D-glucopyranose EXACT_SYNONYM kg_microbe
Role: Carbon source; Properties: Organic compound, Defined component, Simple component RAW_TEXT CultureMech
N--Acetyl--D--glucosamine (Sigma) CATALOG_VARIANT culturemech:output/ingredient_occurrences.tsv
2-Acetamido-2-deoxy-D-glucose RAW_TEXT sssom_other_backfill
GlcNAc RAW_TEXT sssom_other_backfill
N-Acetylchitosamine RAW_TEXT sssom_other_backfill

Chemical properties

Cas rn
7512-17-6
Molecular formula
C8H15NO6
Smiles
CC(=O)N[C@H]1C(O)O[C@H](CO)[C@@H](O)[C@@H]1O
Inchi
InChI=1S/C8H15NO6/c1-3(11)9-5-7(13)6(12)4(2-10)15-8(5)14/h4-8,10,12-14H,2H2,1H3,(H,9,11)/t4-,5-,6-,7-,8?/m1/s1
Molecular weight
221.209
Data source
ChEBI
Retrieval date
2026-09-10T09:35:46.753696+00:00

Evidence (1)

CURATOR_JUDGMENT via MIM curation (#460)

N-acetyl-D-glucosamine is the free monosaccharide; CHEBI:8006 is the peptidoglycan residue and carries the wrong polymer formula.

Occurrence statistics

Total occurrences
29
Distinct media
29

Curation history

TimestampCuratorActionNew statusChanges
2026-03-09T06:54:18.022301+00:00 import_from_culturemech IMPORTED MAPPED Initial import from CultureMech pipeline
2026-04-05T19:53:05.967481+00:00 fetch_cas_rn_from_pubchem ADDED_CAS_RN MAPPED Added CAS-RN:72-87-7 from PubChem API via name lookup (N-Acetyl-D-glucosamine)
2026-04-05T21:48:45.402541+00:00 fetch_cas_rn_from_culturebot_csv ADDED_CAS_RN MAPPED Added CAS-RN:7512-17-6 from CultureBotHT compounds_to_cas.csv (matched: N-acetyl-D-glucosamine)
2026-04-18T00:00:00+00:00 cbclaw_kg_microbe_sweep LLM ADDED_SYNONYMS MAPPED Added 2 synonyms from kg-microbe P4.4 enrichment: 2-acetamido-2-deoxy-D-glucopyranose, Peptideglycan(N-acetyl-D-glucosamine)
2026-04-19T07:39:40.088622+00:00 audit_mim_merge MERGED_FROM_DUPLICATES MAPPED Absorbed 1 duplicate MIM record(s) into this one: N-acetyl-d-glucosamine_2.yaml. Synonyms, curation_history, and occurrence counts were unioned/summed; winner selected by highest occurrence count with preferred_term readability tie-break.
2026-04-19T07:39:40.088267+00:00 audit_resolve_risky_cas_rn RESOLVED_CAS_RN_CONFLICT MAPPED CAS-RN conflict across merged group (72-87-7|7512-17-6) resolved via OAK canonical xref: UNKNOWN (no_oak_cas)
2026-05-01T07:35:34.935155+00:00 auto_classify_ingredient_type AUTO_CLASSIFY_INGREDIENT_TYPE set ingredient_type=SINGLE_INGREDIENT (CHEBI primary)
2026-05-01T08:08:30.987471+00:00 auto_classify_ingredient_type AUTO_BACKFILL_CHEBI_CHEMISTRY molecular_formula=C34H60N8O18; inchi=InChI=1S/C34H60N8O18/c1-13(28(49)42-19(12-56-36)31; smiles=CC(=O)N[C@@H]1[C@@H](O[C@H](C)C(=O)N[C@@H](C)C(=O)
2026-05-02T03:12:16.699500+00:00 auto_classify_ingredient_type AUTO_CLASSIFY_INGREDIENT_TYPE set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula))
2026-05-29T23:35:36.112002+00:00 extract_roles_from_synonyms ANNOTATED Added media role: CARBON_SOURCE (confidence: 1.00)
2026-07-20T00:00:00+00:00 migrate_media_roles_to_facets ANNOTATED Migrated legacy media_roles to role facets (#128): CARBON_SOURCE -> nutritional_roles.CARBON_SOURCE
2026-08-10T00:00:00+00:00 regrade_synonym_matches REGRADED_EXACT_TO_SYNONYM mapping_quality EXACT_MATCH -> SYNONYM_MATCH (#317). The record's label does not equal the term's primary label 'Peptidoglycan(N-acetyl-D-glucosamine)'; it matches the ChEBI synonym 'Peptideglycan(N-acetyl-D-glucosamine)' on CHEBI:8006. The schema defines EXACT_MATCH as a direct match to the term and SYNONYM_MATCH as a match to a known synonym, so the recorded grade overstated. ontology_id is unchanged — the term is correct. The SSSOM predicate is unaffected (both grades emit skos:exactMatch).
2026-08-27T03:16:39.519369+00:00 refresh_occurrence_statistics CORRECTED occurrence_statistics 9/9 -> 29/29 (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: 'N--Acetyl--D--glucosamine (Sigma)' (x2 CultureMech mentions). Source: culturemech:output/ingredient_occurrences.tsv.
2026-09-02T17:40:44.716277+00:00 claude_sssom_surface_form_backfill ADDED_SYNONYMS Recovered 1 surface form(s) that the published SSSOM `other` carried but no curated record did, so a rebuild would have dropped them from KGX: '2-Acetamido-2-deoxy-D-glucose'. Tokens already present on the kg-microbe ontology node were left out as redundant (#520).
2026-09-02T22:41:49.137449+00:00 claude_sssom_surface_form_backfill ADDED_SYNONYMS Recovered 2 surface form(s) that the published SSSOM `other` carried but no curated record did, so a rebuild would have dropped them from KGX: 'GlcNAc'; 'N-Acetylchitosamine'. Tokens already present on the kg-microbe ontology node were left out as redundant (#520).
2026-09-10T09:35:46.753696+00:00 fix_lowercase_stereodescriptors LLM CORRECTED MAPPED Re-grounded CHEBI:8006 'Peptidoglycan(N-acetyl-D-glucosamine)' -> CHEBI:506227 'N-acetyl-D-glucosamine' (EXACT_MATCH); replaced the peptidoglycan-residue chemistry and dropped its inherited peptideglycan synonym (#460).