penem

CHEBI:35994 ·resolve ·ANTIMICROBIAL_UNSPECIFIED ·EXACT SEEDED

An organic heterobicyclic compound that consists of (5R)-4-thia-1-azabicyclo[3.2.0]hept-2-ene bearing a 7-keto substituent. The parent of the class of penems. — 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:35996 CHEBI:35996

Chemical structure

Computed structure properties
Molecular formula	C5H5NOS
Charge	0
Average mass	127.168 Da
Monoisotopic mass	127.00918 Da
Source	ChEBI
InChIKey	HHXMXAQDOUCLDN-RXMQYKEDSA-N

SMILES

[H][C@@]12CC(=O)N1C=CS2

InChI

InChI=1S/C5H5NOS/c7-4-3-5-6(4)1-2-8-5/h1-2,5H,3H2/t5-/m1/s1

Also called

2,3-didehydropenam (EXACT_SYNONYM)— chebi
(5R)-4-thia-1-azabicyclo[3.2.0]hept-2-en-7-one (EXACT_SYNONYM)— chebi

Activity roles

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

CHEBI:33281 CHEBI:33281

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:35994`	penem	`antibioticmech:chebi-30bc998759`	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.