Molecule Builder (OvOHongYu)

• Tested by running it
• Seen in the app
• The manual says yes
• Partly, with the reason shown
• Not supported
• Not established, which is not the same as no

Select a mark for its proof. A filled mark opens our screenshot, or the manual if the check left nothing to picture. A ring opens the manual.

Drawing structures

• Yes, tested by running it: Added and changed single, double and triple bonds. Opens the screenshot.Single, double and triple bondsAdded and changed single, double and triple bonds.github.com
• No: Stereochemistry editing is explicitly unsupported; stereo fields are reserved. Opens the cited page.Wedge, hash and wavy bondsStereochemistry editing is explicitly unsupported; stereo fields are reserved.github.com
• No: Bond model supports only single, double, triple and aromatic bonds. Opens the cited page.Dative, hydrogen and quadruple bondsBond model supports only single, double, triple and aromatic bonds.github.com
• Not establishedChoose double-bond side
• Partly: Phenyl group inserts a benzene ring; no ring-size tools visible. Opens the screenshot.Ring toolsPhenyl group inserts a benzene ring; no ring-size tools visible.github.com
• Not establishedChair and Haworth rings
• Not establishedChain tool
• Partly: Fixed functional groups and phenyl insert; no broader template library. Opens the screenshot.Template libraryFixed functional groups and phenyl insert; no broader template library.github.com
• Partly: Library saves and reloads whole molecules, replacing the drawing. Opens the screenshot.Save your own templatesLibrary saves and reloads whole molecules, replacing the drawing.github.com
• Yes, tested by running it: Ph group expands into a chemically recognized phenyl ring. Opens the screenshot.Group abbreviationsPh group expands into a chemically recognized phenyl ring.github.com
• Partly: Fixed element buttons; no charge or isotope editing controls. Opens the cited page.Charges, isotopes and atom labelsFixed element buttons; no charge or isotope editing controls.github.com
• Not establishedRadicals and lone pairs
• Not establishedKeyboard drawing
• Partly: Individual atom and bond selection; no lasso or transforms visible. Opens the screenshot.Lasso select and transformsIndividual atom and bond selection; no lasso or transforms visible.
• Not establishedTilt drawings in perspective

Reactions and mechanisms

• Yes, according to the manual: Source checkout; equilibrium/resonance become forward arrows in SVG/PNG exports. Opens the cited page.Reaction arrowsSource checkout; equilibrium/resonance become forward arrows in SVG/PNG exports.github.com
• No: No curved arrow control found. Opens the cited page.Curved mechanism arrowsNo curved arrow control found.
• Yes, according to the manual: Source checkout; chemical graphs, RXN and reaction SMILES. Opens the cited page.Machine-readable reactionsSource checkout; chemical graphs, RXN and reaction SMILES.github.com
• Not establishedAtom mapping
• Not establishedOrbitals and symbols

Figures and layout

• Partly: Plain reaction captions only; no font controls; source checkout. Opens the cited page.Rich text captionsPlain reaction captions only; no font controls; source checkout.github.com
• Not establishedShapes, brackets and curves
• Not establishedAlign and distribute
• Not establishedGroup and ungroup
• Yes, according to the manual. Opens the cited page.2D structure cleanupgithub.com
• Not establishedJournal drawing styles
• Not establishedReusable custom styles
• Not establishedColor control
• Partly: Fixed blue selection halos only; no persistent highlight styling. Opens the cited page.Color highlightingFixed blue selection halos only; no persistent highlight styling.github.com
• Not establishedPage layout and multipage
• Not establishedImported pictures
• Not establishedTLC plates and tables

Chemistry intelligence

• Yes, tested by running it: Attempted overvalent carbon flagged and rejected. Opens the cited page.Structure checkingAttempted overvalent carbon flagged and rejected.github.com
• No: R/S and E/Z support is listed as future work. Opens the cited page.R/S and E/Z labelsR/S and E/Z support is listed as future work.github.com
• Partly: Formula updates; molecular mass is not displayed. Opens the screenshot.Formula and massFormula updates; molecular mass is not displayed.github.com
• Not establishedProperty estimates
• No: Typing caffeine into the name field left ethane unchanged. Opens the cited page.Name to structureTyping caffeine into the name field left ethane unchanged.
• Yes, tested by running it: Changing ethane to ethene updated the IUPAC name. Opens the screenshot.Structure to nameChanging ethane to ethene updated the IUPAC name.github.com
• Not establishedNMR prediction
• Not establishedR-groups and query structures
• No: Polymerization hints only; no editable polymer repeat-unit representation. Opens the cited page.Polymers and repeat unitsPolymerization hints only; no editable polymer repeat-unit representation.github.com
• No: Biomacromolecules are explicitly outside the supported scope. Opens the cited page.Peptides and nucleic acidsBiomacromolecules are explicitly outside the supported scope.github.com
• Not establishedImage to structure
• Not establishedOnline structure lookup
• No: No 3D view control found. Opens the cited page.3D model viewNo 3D view control found.
• Not establishedCrystal structures

Files and exchange

• No: No CDXML import or export control found. Opens the cited page.CDXML import and exportNo CDXML import or export control found.
• Not establishedCDX import and export
• Partly: MOL exports, but RDKit rejects coordinates; no import or SDF control. Opens the screenshot.MOL and SDFMOL exports, but RDKit rejects coordinates; no import or SDF control.github.com
• Partly: SMILES exports; pasting fixture SMILES did not import. Opens the screenshot.SMILESSMILES exports; pasting fixture SMILES did not import.github.com
• Partly: InChI and InChIKey displayed and updated; no import found. Opens the screenshot.InChIInChI and InChIKey displayed and updated; no import found.github.com
• Yes, according to the manual: Source checkout; RXN V2000 export. Opens the cited page.RXN filesSource checkout; RXN V2000 export.github.com
• Yes, tested by running it: Downloaded SVG of a manually built ethylbenzene. Opens the screenshot.SVG exportDownloaded SVG of a manually built ethylbenzene.github.com
• Yes, according to the manual: Source checkout; browser Print to PDF preserves vectors. Opens the cited page.PDF exportSource checkout; browser Print to PDF preserves vectors.github.com
• Partly: PNG exports at 447×471; no DPI metadata or resolution control. Opens the screenshot.High-resolution PNGPNG exports at 447×471; no DPI metadata or resolution control.github.com
• Not establishedPaste to and from ChemDraw
• Not establishedEditable in Word or PowerPoint
• Not establishedWindows Office OLE

APIs and automation

• Not establishedPython API
• Yes, according to the manual: Documented TypeScript layout function. Opens the cited page.JavaScript or TypeScript APIDocumented TypeScript layout function.raw.githubusercontent.com
• Not establishedCommand-line tool
• Not establishedAI agent control
• Not establishedBuilt-in AI assistant

Embedding and extension

• Partly: User-supplied HTTP prediction backends only. Opens the cited page.PluginsUser-supplied HTTP prediction backends only.raw.githubusercontent.com
• Not established: Standalone React app; no supported embedding interface found.Embed in your own appStandalone React app; no supported embedding interface found.github.com