Checking these key structures in SF (via SMILES paste-across from PubChem) shows informative differences to the public domain. As expected, connectivity was more extensive with 24 documents for CCG-1423 (= RN 285986-88-1 for racemate but no documents for R and S), 4 for CCG-203971 (= RN 1443437-74-8), 2 for , and 3 for the chemical probe CCT251236 . Some of this document connectivity would be difficult to track in in open sources. However, others are spurious in terms of bioactivity, for example opportunistic mentions of CCG-1423 in low-relevance patents (although the same problem occurs if automated extractions submitting to PubChem happen to have CCG-1423 in their n2s look-up dictionary). However, there are no n2s directly associated with the substance identifiers.