Derwent Chemistry Resource

Derwent Chemistry Resource (DCR) offers structure searching and various other substance identification and indexing data of the chemical structures indexed from update 199916 forward within Derwent World Patents Index® (DWPISM) and the Derwent Drug File (DDF).

For patents included in DWPI, DCR includes:

  • All claimed compounds.
  • At least the main (best) example. If there are few claimed compounds, more examples are selected.
  • For compounds outside the claims, priority of selection is given to real compounds (i.e., those with good supporting physical and/or biological data).
  • Where compounds are selected from a range of examples, those that best illustrate the structural diversity of patent coverage are selected.

Subject Coverage

Derwent Chemistry Resource includes biological, organic, organometallic and inorganic compounds.


Derwent Chemistry Resource cites chemical structures from the more than one million patents classified in Derwent Sections B, C and E (Pharmaceuticals, Agrochemicals and General Chemistry). 

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