DCR Reference Manual - A supplement for the DERWENT WORLD Patents Index STN online user guide
The DWPI Chemistry Resource is a chemical structure database for searching specific chemical structures indexed in Derwent World Patent Index (DWPI) bibliographic records. DWPI Chemistry Resource was released on STN in August 1999 as an integral part of the DWPI suite of files. As of spring 2007 there are about one million compounds in DCR. The database is searchable both by chemical structure and by various text fields, allowing simple access to the DWPI database requiring only a minimum of specialist knowledge. DWPI Chemistry Resource indexing commenced in DPWI update 199916, and runs in parallel to, and to a certain extent replicates, current subscriber Chemical Indexing (Fragmentation Codes) for patents classified in Chemical Patents Index (CPI) Sections B (Pharmaceuticals), C (Agrochemicals) and/or E(General Chemicals).