UK-2B

CHEBI:66340 ·resolve ·ANTIFUNGAL ·EXACT SEEDED

A lactone which is 9-methyl-1,5-dioxonane-2,6-dione substituted by a benzyl group at position 8, a [(3-hydroxy-4-methoxypyridine-2-yl)carbonyl]amino group at position 3 and a (2-methylbut-2-enoyl)oxy group at position 7. It is isolated from the mycelia cake of Streptomyces sp. 517-02 and exhibits potent antifungal activity. — 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.

CHEBI:25000 CHEBI:25000
CHEBI:29347 CHEBI:29347
CHEBI:35618 CHEBI:35618
CHEBI:38182 CHEBI:38182
CHEBI:62733 CHEBI:62733

Chemical structure

Computed structure properties
Molecular formula	C27H30N2O9
Charge	0
Average mass	526.542 Da
Monoisotopic mass	526.19513 Da
Source	ChEBI
InChIKey	NRCFYQYMBDTOBT-PJQLUOCWSA-N

SMILES

C/C=C(\C)C(=O)OC1C(C)OC(=O)C(NC(=O)c2nccc(OC)c2O)COC(=O)C1Cc1ccccc1

InChI

InChI=1S/C27H30N2O9/c1-5-15(2)25(32)38-23-16(3)37-27(34)19(29-24(31)21-22(30)20(35-4)11-12-28-21)14-36-26(33)18(23)13-17-9-7-6-8-10-17/h5-12,16,18-19,23,30H,13-14H2,1-4H3,(H,29,31)/b15-5+

Also called

8-benzyl-3-[(3-hydroxy-4-methoxypyridine-2-carbonyl)amino]-6-methyl-4,9-dioxo-1,5-dioxonan-7-yl (2E)-2-methylbut-2-enoate (EXACT_SYNONYM)— chebi

Cross-references

Equivalent identifiers for this same structure in other resources.

reaxys:7611502

Activity roles

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

CHEBI:33281 CHEBI:33281
CHEBI:35718 CHEBI:35718

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:66340`	UK-2B	`antibioticmech:chebi-6df4538487`	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

Provenance

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