Resolved chemical identity

(5S)-7-(pyrazin-2-yl)-2-oxa-7-azaspiro[4.4]nonane

Deposited research ligand · no curated assay

complete_deposited_InChIKey

0 assay / association records0 preparations1 research-ligand PDB entries

Clinical / development status: Not independently curated. A chemical probe classification does not imply medicinal approval.

Identity is separate from preparation

Chemical identity

Stable identity: INCHIKEY:ITTBXBSSJHVWJS-NSHDSACASA-N
Full InChIKey: ITTBXBSSJHVWJS-NSHDSACASA-N
Source identity status: complete deposited InChIKey
Deposited CCD identifiers: U0S
External identifiers: See deposited identity and source links

Reference formula: C11H15N3O
Calculated molecular weight: 205.261
Calculated descriptors: cLogP 1.0934 · TPSA 38.25 Å² · HBD 0 · HBA 4RDKit 2025.09.3; calculations for this source identity, not experimental measurements.
Depiction validation: verified smiles full inchikey match

SMILES, InChI & complete identity record

Isomeric SMILES: c1cnc(cn1)N2CC[C@@]3(C2)CCOC3
InChI: Not curated

{
  "aliases": [
    "(5S)-7-(pyrazin-2-yl)-2-oxa-7-azaspiro[4.4]nonane"
  ],
  "ccd_ids": [
    "U0S"
  ],
  "ccd_names": "[\"(5S)-7-(pyrazin-2-yl)-2-oxa-7-azaspiro[4.4]nonane\"]",
  "ccd_types": "[\"non-polymer\"]",
  "chemical_id": "INCHIKEY:ITTBXBSSJHVWJS-NSHDSACASA-N",
  "connectivity_block": "ITTBXBSSJHVWJS",
  "curated_source_sha256": null,
  "curation_version": "frozen-v1.2",
  "external_identifiers": {},
  "formal_charge_by_ccd": "{\"U0S\": 0}",
  "formulae": "[\"C11 H15 N3 O\"]",
  "geometry_note": "CCD ideal SDF is a reference chemical geometry, not a deposited bound pose.",
  "identity_status": "complete_deposited_InChIKey",
  "inchikey": "ITTBXBSSJHVWJS-NSHDSACASA-N",
  "inventory_origin": "v1_CCD_inventory",
  "isomeric_smiles": "c1cnc(cn1)N2CC[C@@]3(C2)CCOC3",
  "primary_name": "(5S)-7-(pyrazin-2-yl)-2-oxa-7-azaspiro[4.4]nonane",
  "retrieval_date": "2026-10-24",
  "smiles_stereo_by_ccd": "{\"U0S\": \"c1cnc(cn1)N2CC[C@@]3(C2)CCOC3\"}",
  "source_metadata_sha256": "{\"U0S\": \"41799ff87e41977a678a27c148aaa53439969df512b0b19cf8916005f8151045\"}",
  "source_urls": [
    "https://www.rcsb.org/ligand/U0S"
  ]
}

Measured target and original context

Bioactivity & experimental observations

Download assay CSV

Each row is one source-specific observation. Repeated measurements of this compound are not independent compounds. Direct binding, functional displacement and cellular outcomes retain their distinct endpoints.

Preparation	Tested target & construct	Method / endpoint	Original observation	Conditions & uncertainty	Source & verification
No observations match these filters. Missing curation is not evidence of biological inactivity.

Exact deposited instances

Experimental structures

Native-core and broader Pfam proximity are distinguished from contacts elsewhere in a protein. Each action opens the actual deposited ligand instance. Geometric proximity does not supply a measured binding affinity.

Entry / ligand	Native domain & protein chain	Geometric evidence	Minimum distance	Inspect
7HG2 · U0SPDB:7HG2:LIG:K:U0S:103:.	HDGFL2 PWWP1Protein label chain A · ligand label chain K	native annotation core contactexperimentally deposited fragmentscreened fragment structure · research ligand. Deposited geometry is not solution affinity.	Core: 3.7097 Å Pfam: 3.7097 Å	View deposited instance
7HG2 · U0SPDB:7HG2:LIG:K:U0S:103:.	HDGFL2 PWWP1Protein label chain B · ligand label chain K	native annotation core contactexperimentally deposited fragmentscreened fragment structure · research ligand. Deposited geometry is not solution affinity.	Core: 2.6957 Å Pfam: 2.6957 Å	View deposited instance

Preparations, identities and controls remain separate

Experimental context

No measured preparation is linked to this deposited identity in the curated snapshot.

Provenance and reproducibility

Sources & downloads

https://www.rcsb.org/ligand/U0S

Download complete evidence JSON Curation methods & source receipts

Snapshot 2026-10-26 · phase5-1.0.0 · original measurements, operators, constructs and uncertainty are retained in the exports.