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MIT All Small Molecules project

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The complete ASM molecule set is available as a download as an Excel spreadsheet with chemical structures as SMILES strings, as an SDF file, or you can open in your browser as a web page. To save the Excel and SDF files, please right-click on the links below and 'save as'. Old versions are also available as a ZIP archive for reference.

If you use our database, please cite it using

Toward a List of Molecules as Potential Biosignature Gases for the Search for Life on Exoplanets and Applications to Terrestrial Biochemistry Sara Seager, William Bains, Janusz J. Petkowski Astrobiology 2016, 16 (6): 465-85. (Download citation)

A Data Resource for Prediction of Thermodynamic Properties of Small Molecules. William Bains, Janusz J. Petkowski, Zhuchang Zhan, Sara Seager. Data 2022 submitted(Citation download pending)

Current version download

Previous versions

V 4.5