DCR (Derwent Chemistry Resource)
SubjectCoverage• Organic and inorganic chemical compounds• Basic compounds, salts and mixtures as well as oligomers with less than 9 repeatinggroups, enzymes, proteins, chemically modified polysaccharides and standard
polymers

File Type

Structure

Features

Alerts (SDIs)

Monthly, weekly, or with each update (2 updates per week)(every update is the default).
In addition, SMARTracker, an automatic crossfile current awarenesssearch, (SDI XFILE) using a DCR search profile in
WPINDEX, WPIX and WPIDS may be run every update, weekly orbiweekly (every update is the default).

CAS Registry
Number®
Identifiers

SLART

Keep & Share

Structures



RecordContent• Chemical compounds from Derwent World Patents Index (DWPI) documents• DCR numbers - unique identifiers for specific chemical compounds and link tocorresponding DWPI database records• Systematic chemical names, commonly used chemical names and synonym names• Molecular formulas• Structure diagrams• Specific structure identifiers• Substance descriptors• Controlled terms

File SizeMore than 5.2 million specific chemical compounds (02/2024)

Coverage• 1999-present• Partial coverage 1981-present: Commonly used and significant compounds• Chemical structure diagrams 1992-present

Updates

Updated twice a week with about 3,900 new chemical compounds

Language

English

Database
Producer

Clarivate
Friars House, 160 Blackfriars Rd.
London SE1 8EZ
United Kingdom
Copyright Holder: Clarivate

Sources

Claims and examples of patents indexed in the Derwent World Patents Index (DWPI)
and classified in Chemical Patents Index (CPI) Sections B (Pharmaceuticals),C (Agrochemicals) and/or E (General Chemicals)

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User Aids

Enhanced and restructured DWPI and DCR: What you need to know as
DCR user
Online Helps (HELP DIRECTORY lists all help messages available)
STNGUIDE

Cluster

STRUCTURE
STN Database Cluster Information:
https://www.cas.org/support/training/stn/database-clusters

RelatedDatabases

February 2024

WPINDEX, WPIDS, WPIX

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DCR

Search and Display Fields
Fields that allow left truncation are indicated by an asterisk (*).

Search Field Name

SearchCodeDisplay
Codes

Search Examples

Basic Index * (contains single terms
from CN, CMT, MF and SCT)

None(or /BI)S ?PHENYLETHER?
S UBIQUINONE/CMTS C19H19FN2O2SS ACETYLCHOLINE-RECEPTOR

CMT, CN.P,
CN.S, MF,SCT.DA,SCT.MA, SY

Accession Number (DCR Number)
Chemical Name (CN.P, CN.S, SY)
Chemical Name Segment *(from CN)
Chemical Name, Preferred
Chemical Name, Synonym
Chemical Name, SystematicComment
Component Molecular Formula/AN/CN/CNSS DCR-5303196/AN
S MANDELIC ACID/CNS DISULFONYL DIAZIDE/CNS

AN
CN.P,CN.S,SY
CN.P,CN.S,SY

/CN.P
/SY
/CN.S
/CMT
/CMF (or/FRAGMF)/CMF.CNTS D-GLUCOSE-6-PHOSPHATE/CN.P
S FALUBIN/SYS DECANE-1,10-DISULFONYL DIAZIDE/CN.S
S FIBROBLAST#/CMTS C H3 F6 P/CMF

CN.P
SY
CN.S
CMT
SMF

S 6/CMF.CNT

SMF/SCT (/CT)

S MAO-INHIBITOR/SCT/SCT.DA (or/CT.DA)/SCT.MA (or/CT.MA)/SDCN

S MAP-KINASE-INH?/SCT.DA

SCT.DA,
SCT.MA
SCT.DAS ADRENALINE/SCT.MA

SCT.MAS R20123/SDCN

SDCN

/DDRN
/SDRN

S 2-184/DDRN
S 1029/SDRN

DDRN
SDRN

/ELC
/ELC.SUB/ELS/ELS.CNT/ED (or/EDCR)/FA/MF/MW/NC/NC.TOT/PG/SRIN
/SMF
/DCSE
/SD (or /CC)
/SS/UP (or/UPCR)/UPWX

S (S AND O AND C AND H)/ELS AND 4/ELC
S (S AND C AND H)/ELS AND 4/ELC.SUB
S FE/ELSS O/ELS(S)7/ELS.CNT
S 20210323/ED

MF
MF
MF
MF
ED

S DDRN/FA
S H CL2 N/MF
S 17-21/MW
S 9-11/NC
S 4/NC.TOT AND L11
S A2/PG
S 11895/SRIN
S "B *1; SI *1; TOTAL *2; TYPE *2"/SMF
S 70-0-0-0/DCSES HALOCARBONS/SDS PHOSPHONIC-ACID/SSS JAN 2000/UP

Not displayed
MF
MW
SMF
SMF
Not displayed
SRIN
SMF
DCSESDSSUPS 19990719/UPWX

UPWX

Component Molecular Formula,Count
Controlled Term, Substance(SCT.DA, SCT.MA)
Controlled Term, Substance, Drug
Activity
Controlled Term, Substance,
Mechanism of Action
Derwent Compound Number,
Substance (2)Derwent Drug Registry Name
Derwent Registry Number,
Substance (2)Element Count (1)Element Count Substance (1)Element Symbol
Element Symbol, Count (1)Entry Date, Chemistry Resource (1)Field Availability
Molecular Formula
Molecular Weight (1)Number of Components (1)Number of Components, Total (1)Periodic Group
Ring Index Number, Substance (2)Standardized Molecular Formula
Structured DCR Number
Substance Descriptor
Substructure Terms
Update Date, DCR (1,3)
Update Date, DWPI Cross
Reference (1,4)(1) Numeric search field that may be searched with numeric operators or ranges.
(2) Cross reference to indexing in bibliographic records. Select data from SDCN or SDRN or SRIN and search in /DCN resp. /DRN, resp.
/RIN to retrieve bibliographic records.
(3) UPCR is created when existing records are updated or when new compounds enter the Chemistry Resource Segment.
(4) UPWX is created when DCR compounds are cited in bibliographic records. UPWX may be used in automatic current awarenesssearches (SDIs) in the Chemistry Resource Segment.

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Structure SearchingTerms

Search Examples

L-numbers of structures built using the STRUCTURE editor in STNext
L-numbers of structures built using the STRUCTURE command (Boolean
logic allowed between L-numbers)
L-numbers of screen sets created using the SCREEN command (Boolean
logic allowed between the L-numbers)
L-numbers of structures built using the STRUCTURE command combinedwith L-numbers of screen sets created using the SCREEN command(Boolean logic allowed between the L-numbers)

SEARCH L1 FAM
SEA L1 AND L2 SSS
S L3 OR L4 SSS
S L1 AND L2 NOT L3

Types of Structure Searching
SearchCodeTypeDefinition

Substructure(default)

Search for substances which match the query.
Substitution is allowed at all open positions.
Additional components may be retrieved.
Search for substances which match the query
exactly. Substitution is allowed at positions byassigning non-hydrogen attachments. Right click on anode or group of nodes and use the Non-Hydrogen
Count tab in the STNext structure drawing tool.
Additional components may be retrieved.
Search for substances which match the query exactly
Search for substances which match the query
exactly. Additional components may be retrieved.

ClosedSubstructure

Exact
Family

SSS

CSS

EXA
FAM

Search Examples
SEARCH L1 SSS
S L2 OR L3 SSS
S L7 SSSSEARCH L1 CSS
S L2 NOT L3 CSS
S L4 OR L5 CSS

S L5 EXA FUL
S L6 FAM

Scopes of Structure Searching
Scope

Definition

SearchCodeSearch Examples

Sample(default)

Search a fixed 10% of the file (a maximum of 50records displayed)

SAM

S L6 SSS SAM

Full

Search 100% of the fileFUL

S L5 OR L8 SSS

Subset Sample

Search a fixed sample of an answer set createdby a search in DCR

SUB SAM

S L7 SSS SUB=L5 SAM

Subset Full

Search 100% of an answer set created by asearch in DCRSUB FULS L7 SSS SUB=L5 FUL

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DISPLAY and PRINT Formats
Any combination of formats may be used to display or print answers. Multiple codes must be separated byspaces or commas, e.g., D L1 1-5 TI AU. The fields are displayed or printed in the order requested.
Hit term highlighting is available for all fields. Highlighting must be ON during SEARCH to use the HIT, KWIC,and OCC formats.
FormatContentExamples

ANCMT
CN (1)
CN.P (1)
CN.S (1)DCSE
DDRN
ED (EDCR)
MF
MW
SCT (CT)SD (CC)
SDCN
SDRN
SMF
SRIN
SS
STR
SY (1)UP (UPCR)
UPWX

Accession Number (DCR Number)Comment
Chemical Name (includes CN.P,CN.S and SY)
Chemical Name, Preferred
Chemical Name, Systematic
Structured DCR Number
Derwent Drug Registry Name
Entry Date, Chemistry Resource
Molecular Formula
Molecular WeightControlled Term, Substance (includes SCT.DA and SCT.MA)
Substance Descriptor
Derwent Compound Number, Substance
Derwent Registry Number, SubstanceStandardized Molecular Formula
Ring Index Number, Substance
Substructure Terms
Chemical Structure Display
Chemical Name, Synonym
Update Date, DCR
Update Date, DWPI Cross Reference

D AN
D CMT
D CN
D CN.P
D CN.S 1-5
D DCSE
D DDRN L1 1-2
D ED
D MF
D MW
D SCT
D SD
D SDCND SDRN
D SMF
D SRIN 1-10
D SS
D STR
D SY
D UP
D UPWXALL (FULL)D ALL

ISTDSCAN (2)SAMPLE (SAM)

AN, DCSE, CN.P, CN.S, SY, STR, CMT, MF, SMF, MW, SRIN, SDCN,SDRN, SD, ED, UP, UPWX
ALL, indented with text labels
AN, DCSE, CN.P, CN.S, SY, STR, CMT, MF, SMF, MW, SRIN, SDCN,SDRN, DDRN, SD, SCT.DA, SCT.MA, SS, ED, UP, UPWX
MAX, indented with text labels
AN, DCSE, CN.P, CN.S, SY, STR, CMT, MF, ED, UP, UPWX(STD is the default)
STD, indented with text labels
CN.S, MF, STR (random display without answer number)
CN.S, MF, STRHITKWIC
OCC

Hit term(s) and field(s)Up to 50 words before and after hit term(s) (KeyWord-In-Context)
Number of occurrences of hit term(s) and field(s) in which they occur

D HIT
D KWIC
D OCC

IALLMAXIMAX
STD (IDE)D IALLD MAX
D IMAX
D STD 1-4
D ISTDD SCAND SAM(1) All Chemical Names, .Preferred, Systematic and Synonym, are displayed with the CN display code.
(2) SCAN must be specified on the command line, i.e., D SCAN or DISPLAY SCAN.

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SELECT, ANALYZE, and SORT Fields
The SELECT command is used to create E-numbers containing terms taken from the specified field in ananswer set.
The ANALYZE command is used to create an L-number containing terms taken from the specified field in ananswer set.
The SORT command is used to rearrange the search results in either alphabetic or numeric order of thespecified field(s).
Field Name
Accession Number (DCR number)
Chemical Name
Chemical Name, Preferred
Chemical Name, Synonym
Chemical Name, SystematicComment
Controlled Term, Substance
Derwent Compound Number, Substance
Derwent Drug Registry Name
Derwent Registry Number, Substance
Entry Date, Chemistry Resource
Molecular Weight
Number of Components
Ring Index Number, SubstanceStandardized Molecular Formula
Structured DCR Number
Substance Descriptor
Update Date, DCR
Update Date, DWPI Cross Reference

Field CodeAN
CN
CN.P
SY
CN.S
CMT
SCT
SDCN
DDRN
SDRN
EDCR (ED)
MWNC
SRIN
SMF
DCSE
SD
UPCR (UP)UPWX

ANALYZE/
SELECT (1)
Y
Y (2)
Y
Y
Y
Y
Y (3)
Y
Y
Y
Y
Y
N
Y
Y
YYY
Y

SORTY
N
NNN
NNYN
YYYYNNYN
YY(1) HIT may be used to restrict terms extracted to terms that match the search expression used to create the answer set, e.g. SEL HIT CN.
(2) Selects or analyzes CN.S, CN.P and SY with /CN appended to the terms created by SELECT.
(3) Selects or analyzes SCT.DA and SCT.MA with /SCT appended to the terms created by SELECT.

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Sample Records
DISPLAY ALL
L8AN
DCSE
CN.SANSWER 1 OF 1 DCR COPYRIGHT 2024 CLARIVATE on STN.
DCR-1000003
DCR1000003-0-0-0
Acrylic acid 3-({[(dicyclohexylcarbamoyl)-methoxy]-acetyl}-phenyl-amino)phenyl ester

STRMF
SMF
MWSDCNSDED

C31 H38 N2 O5C31 H38 N2 O5 *1; TOTAL *1; TYPE *1518.6589
RAG9YEUNSATURATED FATTY ACIDSEntered STN: 24 Jan 2005
Last updated on STN: 24 Jan 2005
Update DWPI Cross Ref.: 24 Jan 2005

DISPLAY IMAX
L11ANSWER 1 OF 1 DCR COPYRIGHT 2024 CLARIVATE on STN.
ACCESSION NUMBER:
DCR-4436
DCR
STRUCTURED DCR NO.:4436-0-0-0
PREF. CHEMICAL NAME:ALPHA-PINENESYSTEMATIC NAME:
2,6,6-Trimethyl-bicyclo[3.1.1]hept-2-ene
SYNONYMS:
ALPHA PINEN; ALPHA-PINEN; ALPHA-PINENE; PINENE,
ALPHA-; PINENE,ALPHA-; PINENE-ALPHASTRFebruary 2024

8DCR
COMMENT:
MOLECULAR FORMULA:
STANDARD MOL. FORMULA:
MOLECULAR WEIGHT:
RING INDEX NUMBER:
DERWENT COMPOUND NO.:DERWENT REGISTRY NO.:DERWENT DRUG REG. NAME:SUBSTANCE DESCRIPTOR:
SCT, DRUG ACTIVITY:

Unspecified stereochemistry
C10 H16C10 H16 *1; TOTAL *1; TYPE *1
136.2364
00832
R004770477
PINENEALPTERPENESACETYLCHOLINESTERASE-INHIBITORS; ANALGESICS;
ANTICHOLINESTERASES; CHOLINESTERASE-INHIBITORS;FUNGICIDES
SCT, MECHANISM OF ACTION:ACETYLCHOLINESTERASE-INHIBITOR; ANTICHOLINESTERASE;CHOLINESTERASE-INHIBITOR
SUBSTRUCTURE TERM:BRIDGE-STRUCT.; CYCLOBUTANE; CYCLOHEXANE; OLEFIN;TERPENE
ENTRY DATE:Entered STN: 3 May 1999
Last updated on STN: 12 Aug 2022
Update DWPI Cross Ref.: 22 Jan 2024

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