international chemical identifier

initialism: InChI
https://doi.org/10.1351/goldbook.11456
A non-proprietary canonical identifier of chemical substances that can be used in printed and electronic data sources to enable easier linking of diverse data compilations.
Examples:
  1. Chloroacetic acid, "InChI=1/C2H3ClO2/c3-1-2(4)5/h1H2,(H,4,5)/p-1".
  2. 2-Methylpyridine, "InChI=1S/C6H7N/c1-6-4-2-3-5-7-6/h2-5H,1H3".
Source:
PAC, 2016, 88, 239. 'Glossary of terms used in computational drug design, part II (IUPAC Recommendations 2015)' on page 248 (https://doi.org/10.1515/pac-2012-1204)