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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, or an SDF file. Please right-click on the links below and 'save as'. When we update the database we will include old versions 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 S Seager, W Bains, J J Petkowski Astrobiology 2016, 16 (6): 465-85. (Download citation)

Current version download (V4.5)