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Tools · Cheminformatics & Structure

Stereoisomer Enumerator

Expand unassigned stereocenters and E/Z double bonds into explicit stereoisomers with a parent-to-isomer audit

Open in the appRun via API

Hardware and price

Price per run

What a typical run reserves from your wallet: the catalog's expected runtime on each piece of hardware × your plan's per-second rate. Larger inputs reserve more, and you're charged only for the seconds the job actually runs.

Stereoisomer Enumerator: reservation per run, USD
HardwareTypical runtimeBasicStarterProEnterprise
CPUDefault5 min$0.042$0.024$0.015$0.009

In workflows

Chain it with other steps.

Each input and output has a data kind, so the builder only connects steps that fit.

Inputs

  • Molecules (list)SMILES, SDF, MOLBLOCK, INCHI

Outputs

  • ArchiveZIP
  • TableCSV
  • MoleculesSMILES

References

The method behind it.

  1. Greg Landrum, Paolo Tosco, Ricardo Rodriguez et al. (2026). RDKit: Open-source cheminformatics. Zenodo. doi:10.5281/zenodo.591637 (opens in a new tab)
  2. Robert M. Hanson, Sophia Musacchio, John W. Mayfield et al. (2018). Algorithmic Analysis of Cahn–Ingold–Prelog Rules of Stereochemistry: Proposals for Revised Rules and a Guide for Machine Implementation. Journal of Chemical Information and Modeling. doi:10.1021/acs.jcim.8b00324 (opens in a new tab)

Run via API

Submit it from your own code.

Use an API key from your account. The estimate uses your plan's rates; submitting reserves that amount from your wallet.

# Estimate the reservation for your plan (payload fields: see the API reference)
curl -X POST https://api.cognichem.com/api/v1/jobs/estimate \
  -H "X-Api-Key: $COGNICHEM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"job_type": "stereoisomer-enumerate", "resource": "cpu", "payload": {}}'

# Submit (retrying with the same Idempotency-Key never submits twice)
curl -X POST https://api.cognichem.com/api/v1/jobs/submit \
  -H "X-Api-Key: $COGNICHEM_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"job_name": "stereoisomer-enumerate-1", "job_type": "stereoisomer-enumerate", "resource": "cpu", "payload": { ... }}'
Payload fields and examples in the docs

Cheminformatics & Structure

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