The majority of structural data for lichen-derived compounds were downloaded from Lichendex (https://lichendex.wixsite.com/my-site/blank-2) as well as Scifinder and Reaxys. Entries were manually curated, and additional compounds were included, resulting in 1347 unique compounds.The Tanimoto similarity was calculated for all pairwise combinations of the compounds using RDKit, using Morgan fingerprints generated with a radius of 2 and a bit vector 2048 bits long, where only similarities greater or equal to 0.8 were kept. This matrix was visualized in CytoScape with the yFiles Organic layout.