Fig. 27

Implausible ‘valid’ structures in PubChem Compound. a Tetra-tert-butylmethane (CID 15123361), b CID 20695696, c Atom environment with radius r = 2 extracted from (b) used as filter for implausible structures (outgoing connections omitted for clarity), d atom environment with radius r = 3 extracted from (b) used as filter for implausible structures (outgoing connections omitted for clarity).