The Reporting Items for Patent Landscapes statement.

The reporting quality of patent landscapes is inadequate. The Reporting Items for Patent Landscapes (RIPL) checklist can improve reporting quality.

Structural diversity of organic chemistry. A scaffold analysis of the CAS Registry.

By analyzing the scaffold content of the CAS Registry, we attempt to characterize in a comprehensive way the structural diversity of organic chemistry. The scaffold of a molecule is taken to be its framework, defined as all its ring systems and all the linkers that connect them. Framework data from more than 24 million organic compounds is analyzed.