Back to Help Center ChemrytKSM Tutorial

Key Starting Material Help Tutorial

Structure-led guidance for KSM identity review, route selection, supplier discussions, analytical readiness, and impurity-aware process decisions.

Step-By-Step Tutorial

  1. Open ChemrytKSM. The default example is 4-hydroxybenzoic acid; replace it when you are evaluating another KSM.
  2. Draw the molecule in the structure editor or paste its SMILES into the structure input, then enter a clear structure ID and name.
  3. Confirm the displayed structure, salt or charge state, stereochemistry, and tautomer. Resolve any red structure-validation error before prediction; review yellow warnings before interpreting results.
  4. Click `Analyze KSM` to open the result workspace for the current structure. Use `Run Prediction` when you need the ML property and safety screens.
  5. Review the `Structure` and `ML Predictions` tabs first. Check model applicability, confidence, reactive-site or impurity cues, and any metadata gap instead of treating every number as equally reliable.
  6. Use `Route Scouting` to define the API target, KSM entry role, and route count, then generate and compare route candidates and precedent evidence.
  7. Complete the `Vendor` and `Analytics` tabs with supplier identity, lot scale, CAS/IUPAC checks, sample purity, reactivity, assay, chiral, moisture, and thermal evidence.
  8. Use `Regulatory` and `Process Science` to draft the ICH Q11 designation rationale, model impurity carry-over, record CPP hypotheses, and review residual-solvent, elemental-impurity, stoichiometry, and EHS inputs.
  9. Use `Sustainability`, `Integrations`, and `DoE` for green-chemistry metrics, informatics hand-off previews, and an experimental matrix. Save or transfer the reviewed evidence through your controlled project workflow.

Tutorial Notes

  • Keep one chemically defined form throughout a comparison. Changing stereochemistry, protonation, salt form, or tautomer can change predictions and invalidate a baseline comparison.
  • A validation pass means the notation appears usable; it does not prove identity, purity, or suitability as a regulatory starting material.
  • When Live Edit & Compare is enabled, lock the intended baseline before editing the structure and wait for the edited-analog profile to finish updating.
  • Treat route, vendor, regulatory, sustainability, and DoE outputs as structured decision support. Replace example or heuristic values with project-specific, traceable evidence.
  • Investigate unavailable models or metadata gaps explicitly. Do not silently substitute a missing prediction with an assumed value.
  • Record the exact structure, model result date, supplier/sample context, assumptions, and experimental follow-up needed for each decision.

Good Practice

ChemrytKSM supports scientific screening and evidence organization. Confirm identity, specifications, impurity fate, process capability, supplier qualification, safety, and regulatory conclusions with validated analytical data, controlled experiments, current guidance, and authorized expert review.

Use the tutorial as workflow guidance and confirm high-stakes outcomes with validated data.