Similarity + Substructure Search

Overview

Run RDKit Morgan-fingerprint similarity and SMILES/SMARTS substructure matching over a pasted or uploaded library. It is in the Discovery + Design category and is intended to move from individual molecules to search, design, route, and library decisions.

When To Use It

• You need a focused workflow for similarity + substructure search without leaving ChemistryAtlas.
• You want a result that can be saved, shared, or chained into another chemistry app.
• You want the calculation assumptions and limitations visible next to the output.

Inputs

• text - Chemistry input - type: textarea - Use formulas, names, SMILES-like text, reactions, or key=value options. Heavier engines will plug into this same app surface.

Recommended Workflow

• Define the target structure, scaffold, reaction, or library rule; run the design/search operation; triage candidates using feasibility, novelty, safety, and property filters.
• Start with the smallest representative input, confirm the parser understood it, then scale to a larger list or workflow.
• Save the generated report when the result will feed a notebook entry, route review, model comparison, or team discussion.

Outputs

• A Markdown-style chemistry report with parsed inputs, assumptions, and calculated or predicted results.
• Structured tables when the app returns multiple compounds, reagents, routes, peaks, candidates, or model rows.
• Warnings, fallback notes, and sidecar availability messages when a specialized engine is not installed or not reachable.

Method And Backend Notes

This app has a runnable ChemistryAtlas backend path. Backend type: database. ChemistryAtlas roadmap MVP: runnable report now; specialist cheminformatics/model backend plugs into this app surface next. Use the output as a structured starting point for chemistry judgment, follow-up calculation, or experimental planning.

How To Interpret Results

• Use ranked results as shortlists for expert review, literature checks, synthesis feasibility, and orthogonal model validation.
• Compare results across related molecules, controls, blanks, literature examples, or known reactions whenever possible.
• For decisions that affect safety, synthesis scale-up, biological testing, purchasing, or publication, verify with primary data and expert review.

Example Input

c1ccccc1
aspirin
benzoic acid
CCO

Common Checks Before Acting

• Confirm names, salts, stereochemistry, tautomers, protonation state, and hydration state.
• Check units, concentrations, equivalent definitions, and significant figures.
• Record external database versions, model versions, sidecar availability, and any manual edits made after the app output.

Related Apps

• Retrosynthesis Planner (retrosynthesis-planner)
• Forward Reaction / Product Predictor (forward-reaction-predictor)
• Scaffold + R-Group Analyzer (scaffold-rgroup-analyzer)
• Generative Molecular Design (generative-molecular-design)
• Matched Molecular Pairs Analyzer (matched-molecular-pairs-analyzer)

Acknowledgements And Validation

• ChemistryAtlas documentation and UI were prepared for chemistry discovery workflows.
• Where available, calculations may use open-source cheminformatics, reaction-informatics, spectra, docking, or machine-learning engines such as RDKit-family tooling, ASKCOS-style sidecars, ChemProp, ms-pred/ICEBERG, PyScreener, and MolPAL.
• Always verify important results against primary literature, official SDS records, instrument software, validated models, and local laboratory procedures.