chaetoxanthone A

CHEBI:65611 ·resolve ·ANTIPROTOZOAL ·EXACT SEEDED

A bridged organic heteropentacyclic compund that is 3,4,5,6-tetrahydro-2H,8H-2,6-epoxyoxocino[3,2-b]xanthen-8-one substituted by hydroxy groups at positions 4 and 7, a methoxy group at position 9 and a methyl group at position 2 (the 2S,4R,6S stereoisomer). It is isolated from the marine derived fungus Chaetomium and has antiprotozoal 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:33853 CHEBI:33853
CHEBI:35990 CHEBI:35990
CHEBI:38164 CHEBI:38164
CHEBI:3992 CHEBI:3992
CHEBI:59779 CHEBI:59779

Chemical structure

Computed structure properties
Molecular formula	C20H18O7
Charge	0
Average mass	370.357 Da
Monoisotopic mass	370.10525 Da
Source	ChEBI
InChIKey	PYEDKAHYOPGAKC-PDXJJUDESA-N

SMILES

[H][C@]12C[C@@H](O)C[C@](C)(Oc3cc4oc5cccc(OC)c5c(=O)c4c(O)c31)O2

InChI

InChI=1S/C20H18O7/c1-20-8-9(21)6-13(26-20)16-14(27-20)7-12-17(19(16)23)18(22)15-10(24-2)4-3-5-11(15)25-12/h3-5,7,9,13,21,23H,6,8H2,1-2H3/t9-,13+,20+/m1/s1

Also called

(2S,4R,6S)-4,7-dihydroxy-9-methoxy-2-methyl-3,4,5,6-tetrahydro-2H,8H-2,6-epoxyoxocino[3,2-b]xanthen-8-one (EXACT_SYNONYM)— chebi

Cross-references

Equivalent identifiers for this same structure in other resources.

reaxys:19305737

Activity roles

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

CHEBI:35820 CHEBI:35820

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:65611`	chaetoxanthone A	`antibioticmech:chebi-78a46a2409`	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.