Lacto-N-tetraose

Ontology mapping

Primary identifier: cas:14116-68-8
Ontology term: CHEBI:30248 — beta-D-Gal-(1->3)-beta-D-GlcNAc-(1->3)-beta-D-Gal-(1->4)-D-Glc
Ontology label: beta-D-Gal-(1->3)-beta-D-GlcNAc-(1->3)-beta-D-Gal-(1->4)-D-Glc

Nutritional roles

Role
CARBON_SOURCE
Confidence
0.8
Evidence
- Reference type
  COMPUTATIONAL_PREDICTION
  Reference text
  Inferred from curated media-role name pattern
  Curator note
  Provisional role from a curated name-pattern rule; review recommended.

Synonyms (1)

Synonym	Type	Source	Occurrences
beta-D-galactopyranosyl-(1->3)-2-acetamido-2-deoxy-beta-D-glucopyranosyl-(1->3)-beta-D-galactopyranosyl-(1->4)-D-glucopyranose	EXACT_SYNONYM	chebi_synonym_review

Chemical properties

Cas rn: 14116-68-8
Data source: CultureBotHT compounds_to_cas.csv
Retrieval date: 2026-04-29T06:51:33.117170+00:00
Molecular formula: C26H45NO21
Smiles: CC(=O)NC1C(C(C(OC1OC2C(C(OC(C2O)OC3C(OC(C(C3O)O)O)CO)CO)O)CO)O)OC4C(C(C(C(O4)CO)O)O)O
Inchi: InChI=1S/C26H45NO21/c1-6(32)27-11-21(47-25-18(39)15(36)12(33)7(2-28)44-25)13(34)8(3-29)43-24(11)48-22-14(35)9(4-30)45-26(19(22)40)46-20-10(5-31)42-23(41)17(38)16(20)37/h7-26,28-31,33-41H,2-5H2,1H3,(H,27,32)/t7-,8-,9-,10-,11-,12+,13-,14+,15+,16-,17-,18-,19-,20-,21-,22+,23?,24+,25+,26+/m1/s1
Pubchem cid: 440993

Evidence (3)

DATABASE_MATCH via CultureBotHT

Imported from CultureBotHT. CAS-RN 14116-68-8 present, but no CHEBI entry exists (checked OAK CHEBI sqlite + PubChem CID synonyms). Curator can promote to a CHEBI primary if/when CHEBI adds the term.

DATABASE_MATCH via CHEBI via PubChem (pubchem-xref)

Parent class identified via pubchem-xref; matched_via='pubchem CID 440993'

DATABASE_MATCH via MIM curation (#326)

mapping_quality NARROW_MATCH -> SYNONYM_MATCH. The recorded molecular_formula is identical to CHEBI:30248's, and a 'parent' with an identical formula is not a parent — BACKFILL_PARENT_CHEBI found the term via a PubChem xref and filed it as one. Identity confirmed by InChIKey (AXQLFFDZXPOFPO-FSGZUBPKSA-N): the record's own cas_rn, written from CultureBotHT compounds_to_cas.csv at creation and so independent of this mapping, resolves in PubChem to the same key ChEBI records for the term. ontology_id is unchanged.

Occurrence statistics

Total occurrences: 0
Distinct media: 0

Curation history

Timestamp	Curator	Action	New status	Changes
2026-04-29T06:51:33.117170+00:00	audit_add_remaining_culturebotht	CREATED_FROM_CAS_FALLBACK	MAPPED	Created with cas:14116-68-8 as primary identifier; no CHEBI entry exists for this compound.
2026-05-01T07:35:34.468842+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (cas: primary (defined chemical))
2026-05-02T02:53:52.871739+00:00	auto_classify_ingredient_type	AUTO_BACKFILL_PUBCHEM_CHEMISTRY		molecular_formula=C26H45NO21; smiles=CC(=O)NC1C(C(C(OC1OC2C(C(OC(C2O)OC3C(OC(C(C3O)O)O); inchi=InChI=1S/C26H45NO21/c1-6(32)27-11-21(47-25-18(39)1
2026-05-02T03:12:15.683614+00:00	auto_classify_ingredient_type	AUTO_CLASSIFY_INGREDIENT_TYPE		set ingredient_type=SINGLE_INGREDIENT (chemical structure populated (molecular_formula))
2026-05-02T04:51:35.011112+00:00	backfill_parent_terms	BACKFILL_PARENT_CHEBI		set ontology_mapping parent=CHEBI:30248 (pubchem-xref)
2026-06-03T02:06:01.743705+00:00	infer_roles_from_name_lists	ANNOTATED		Added media role: CARBON_SOURCE (confidence: 0.80)
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
2026-08-13T00:00:00+00:00	regrade_identical_formula_parents	REGRADED_PARENT_TO_IDENTITY		mapping_quality NARROW_MATCH -> SYNONYM_MATCH (#326); the narrowMatch parent is the same substance, confirmed by InChIKey via the record's own CAS.