Derwent Chemistry Resource (DCR)
Date revised: 2 August 2021

Description
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) andthe 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.
Sources
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).
Date Coverage
Chemical compounds in patents indexed in DWPI fromupdate 199916 forward

Update Frequency
82 updates/year

Geographic Coverage
International

Document Types
Chemical substances

Publisher
Derwent Chemistry Resource is provided by Clarivate Analytics. Questions concerning file content should be directed toCustomer Care at: http://clarivate.com/about-us/contact-us/.

1© 2023 Clarivate. Clarivate and its logo, as well as all other trademarks usedherein are trademarks of their respective owners and used under license.

Sample document
TI

SUSUBST

SUBST
TI

DTYPE
PUB
RTYPEPD

http://search.proquest.com/professional/docview/1153027091?accountid=137296

AN2© 2023 Clarivate. Clarivate and its logo, as well as all other trademarks usedherein are trademarks of their respective owners and used under license.

FAVSearch fields
Field NameExample

Description and Notes

Accession number

Field
CodeANan(18536)

All fields

ALLall(01829)

All fields + text
DCR number

AN

R01255an(18536)

RN

DIAZEPAM
rn(1255)

A unique document identification number assigned by theinformation provider.
Searches all fields. Use proximity and/or Boolean
operators to narrow search results.
Searching without a field code searches all fields.
The Derwent Chemistry Resource (DCR) number is thesame as the Accession number (field code AN).
Derwent Drug File (DDF) structure identifier.

TI
DTYPE

ti(diazepam)
dtype(patent chemical structure)

DDF structure ID
Derwent registry
numberDocument title
Document type
External DCR
numberFirst available

FAV

fav(20121116)
fav(2012)

From database 1

FDB

VALIUM and fdb(1008437)

Generic nameImage presentGN
IMGANYgn(diazepam)
benzyl* and imgany(yes)Language
Mechanism ofaction
Molecular formula
Molecular weightNotesNumeric indexing
Publication date

The only document type in this database is “patentchemical structure”.

18536-0-0-0

Publication title

PUB

Publication type
Ring index number
Specific compoundnumber
Structured
molecular formula
Subject
Substance
Substance
description
Substructure
Synonym

RTYPE
RN
RN

Englishmec(AGONIST)
mec(GABAMINERGICS)
mf(C16H13ClN2O)
lip(284.7447)
nt(2h labelled isotope)
1pd(20121231)
pd(2012-12-31)
pd(2012)pub(Derwent Chemistry
Resource)
rtype(patent)
rn(01829)
rn(R01255)

SU
SUBST
SUBST

"C16 H13 Cl N2 O""C16 H13 Cl N2 O 1"su(benzodiazepines)
subst(dihydro)
subst(benzo diazepin)

SYN

BH-LINKED-CC
syn(diazepan or zipam)

Updates

UDMECMF
LIP
NTPD

ud(20121231)
ud(2012-12-31)

Indicates the first time a document was loaded in a
specific database. It will not change however many times
the record is subsequently reloaded.
Useful in multi-database searches to isolate records froma single database. FDB cannot be searched on its own;
specify at least one search term then AND it with FDB.
Add “AND IMGANY(YES)” to a query to limit your search
to documents with an image.

Includes Number of fragment types and Total fragments.

In a patent database, the publication title is generally thedatabase name.
The only publication type in this database is "patent".

The systematic chemical name.

The date(s) the record was loaded as a result of an
update provided by the supplier.

1

FDB searches the database ID. Click the “Field codes” hyperlink at the top right of the Advanced Search page. Click “Search syntax and field codes”,
and then click on “FDB command” to get a list of database names and codes that can be searched with FDB.

3

© 2023 Clarivate. Clarivate and its logo, as well as all other trademarks usedherein are trademarks of their respective owners and used under license.

Field codes may be used in searches entered on the Basic Search, Advanced Search and Command Line Search pages.
The tools available for searching are Search Fields, Limit Options, and “Narrow Results By” Limiters. Each is listed
separately below. Some data can be searched using more than one tool

Limit options
Limit options are quick and easy ways of searching certain common concepts. Date limiters are available in which you
can select single dates or ranges for publication date and updated date.

“Narrow Results By” limiters
When results of a search are presented, the results display is accompanied by a list of “Narrow results by” options shownon the right-hand panel. Click on any of these options and you will see a ranked list showing the most frequently occurring
terms in your results. Click on the term to apply it to (“narrow”) your search results. “Narrow results by” limiters include:
Source type, Publication title, Document type, Record type, Language, Database (appears when searching multiple
databases), and Publication date (slider)
Terms & Conditions
In addition to the Dialog Standard Terms & Conditions, the following Provider terms and conditions also apply.

Contact: Global Customer Support
Email: Customer@dialog.com
Within North America 1 800 3 DIALOG (1 800 334 2564)
Outside North America 00 800 33 DIALOG (00 800 33 34 2564)

4© 2023 Clarivate. Clarivate and its logo, as well as all other trademarks usedherein are trademarks of their respective owners and used under license.