nocamycin I

CHEBI:138066 ·resolve ·ANTIBACTERIAL ·EXACT SEEDED

An organic heterotricyclic compound and tetramic acid derivative originally isolated from an unidentified oligosporic actinomycete strain (no. E864-861) and found to be active against both Gram-positive and Gram-negative anaerobic bacteria as well as some aerobic bacteria such as Streptococci. The methyl ester of nocamycin E. — ChEBI

Machine-generated and unreviewed. Identity, structure and cross-references come straight from ChEBI's and CARD's own data; no curator has signed off on this record yet.

Classification

Strictly broader compounds or drug classes this molecule belongs to.

Label unavailable CHEBI:140155
Label unavailable CHEBI:25248
Label unavailable CHEBI:26979
Label unavailable CHEBI:33823
Label unavailable CHEBI:72600
Label unavailable CHEBI:74222
Label unavailable CHEBI:78840

Chemical structure

Computed structure properties
Molecular formula	C26H33NO9
Charge	0
Average mass	503.548 Da
Monoisotopic mass	503.21553 Da
Source	ChEBI
InChIKey	DTURANKMSHIDDI-GMYASLLUSA-N

SMILES

[H][C@]1([C@H](C)/C=C(C)/C=C/C(O)=C2/C(=O)CNC2=O)O[C@@]23O[C@]([H])(C(=O)C[C@]2(C)O[C@H](C)[C@@H]3C(=O)OC)[C@@H]1C

InChI

InChI=1S/C26H33NO9/c1-12(7-8-16(28)19-18(30)11-27-23(19)31)9-13(2)21-14(3)22-17(29)10-25(5)26(35-21,36-22)20(15(4)34-25)24(32)33-6/h7-9,13-15,20-22,28H,10-11H2,1-6H3,(H,27,31)/b8-7+,12-9+,19-16+/t13-,14-,15-,20-,21-,22+,25+,26+/m1/s1

Also called

methyl (2R,3S,3aS,5R,6R,7S,9aS)-5-[(2R,3E,5E,7E)-7-(2,4-dioxopyrrolidin-3-ylidene)-7-hydroxy-4-methylhepta-3,5-dien-2-yl]-2,6,9a-trimethyl-8-oxooctahydro-3a,7-epoxyfuro[3,2-b]oxocine-3-carboxylate (EXACT_SYNONYM)— chebi
(−)-nocamycin I (EXACT_SYNONYM)— chebi
Antibiotic BU 2313B (EXACT_SYNONYM)— chebi
BU 2313B (EXACT_SYNONYM)— chebi
Bu-2313B (EXACT_SYNONYM)— chebi
methyl (1S,2S,3R,5S,8S,9R,10R)-10-[(2R,3E,5E,7E)-7-(2,4-dioxopyrrolidin-3-ylidene)-7-hydroxy-4-methylhepta-3,5-dien-2-yl]-3,5,9-trimethyl-7-oxo-4,11,12-trioxatricyclo[6.3.1.01,5]dodecane-2-carboxylate (EXACT_SYNONYM)— chebi

Cross-references

Identifiers for this same structure in other resources. An accession that lands on two different structures in this corpus is withheld from both rather than shown here, since it names at most one of them.

metacyc.compound:CPD-18224

Patents and articles

Documents about this compound. A patent covers a class and an article covers a topic; neither identifies a structure.

patent:US4181574

Activity roles

Every antimicrobial role a source asserts for this compound — the unreduced evidence behind its antimicrobial_class.

antibacterial agent CHEBI:33282

Source concepts

Every upstream concept that resolved to this record. The merge is the product: this is what shows ChEBI and CARD are describing the same structure.

Upstream concepts merged into this record
Source	Native ID	Label	Minted CURIE	Version
CHEBI	`CHEBI:138066`	nocamycin I	`antibioticmech:chebi-16da342cd5`	2026-08-30

Curation history

SEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources
Seeded from data/raw/ inventories (CHEBI)
RESEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources
Re-seeded from updated data/raw/ inventories
RESEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources
Re-seeded from updated data/raw/ inventories
RESEEDED_FROM_SOURCES 2026-09-10 · seed_from_sources
Re-seeded from updated data/raw/ inventories

Provenance

Seeded by scripts/seed_from_sources.py from the committed inventories in data/raw/. View the record (YAML).

Explore across X-Mech: MediaIngredientMech (nocamycin I) · CultureMech · NaturalProductMech · PathwayMech · TraitMech