leptomycin B

CHEBI:52646 ·resolve ·ANTIFUNGAL ·EXACT SEEDED

A leptomycin having a (2E,10E,12E,16Z,18E)-double bond configuration as well as an ethyl substituent at position 17. — 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:140345
Label unavailable CHEBI:52651

Chemical structure

Computed structure properties
Molecular formula	C33H48O6
Charge	0
Average mass	540.741 Da
Monoisotopic mass	540.34509 Da
Source	ChEBI
InChIKey	YACHGFWEQXFSBS-XYERBDPFSA-N

SMILES

CCC(=C/[C@H](C)C/C=C/C(C)=C/[C@@H](C)C(=O)[C@@H](C)[C@H](O)[C@@H](C)C/C(C)=C/C(=O)O)/C=C/[C@@H]1OC(=O)C=C[C@@H]1C

InChI

InChI=1S/C33H48O6/c1-9-28(14-15-29-24(5)13-16-31(36)39-29)19-22(3)12-10-11-21(2)17-25(6)32(37)27(8)33(38)26(7)18-23(4)20-30(34)35/h10-11,13-17,19-20,22,24-27,29,33,38H,9,12,18H2,1-8H3,(H,34,35)/b11-10+,15-14+,21-17+,23-20+,28-19-/t22-,24+,25-,26+,27-,29+,33-/m1/s1

Also called

(2E,5S,6R,7S,9R,10E,12E,15R,16Z,18E)-17-ethyl-6-hydroxy-3,5,7,9,11,15-hexamethyl-19-[(2S,3S)-3-methyl-6-oxo-3,6-dihydro-2H-pyran-2-yl]-8-oxononadeca-2,10,12,16,18-pentaenoic acid (EXACT_SYNONYM)— chebi
ATS 1287B (EXACT_SYNONYM)— chebi
Antibiotic CI 940 (EXACT_SYNONYM)— chebi
Antibiotic CL 1957A (EXACT_SYNONYM)— chebi
Antibiotic PD 114720 (EXACT_SYNONYM)— chebi
LMB (EXACT_SYNONYM)— chebi
antibiotic ATS 1287B (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.

beilstein:7958583
cas:87081-35-4
reaxys:8299374

Activity roles

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

antifungal agent 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:52646`	leptomycin B	`antibioticmech:chebi-64cd22735d`	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 (YAML).

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