Registry File - Dictionary Search

The Nomenclature File - often referred to only as REG-File - contains all the chemical substances, which have been registered by the Chemical Abstracts Service (CAS) since 1965. Nearly 700,000 structures from 1957 to 1964 are included (Sect. 1.3.1.1). The database currently consists of 12.8 million records with more than 18.3 million names. Every week, between 7000 and 14,000 chemical compounds are added to the file. There is a learn file version to the Registry File, containing about 125,000 substances. All the documents in the learning file are made up exactly in the same way as in the Registry File. It is thus a valuable and low cost preparation to Registry File queries. 

LC STN Files ANABSTR. BEILSTEIN. BIOBUSINESS, BIOSIS, CA, CAOLD, CAPREVIEWS, CASREACT, CHEMINFORMRX, CHEMLIST, CBNB, CIN, CJACS, CSCHEM, DETHERM, EMBASE, GMELIN, HODOC, IFICDB, IFIPAT, IFIUDB, MEDLINE, NAPRALERT, PNI, RTECS, SPECINFO ( File contains numerically searchable property data) 

Elemental I Elemental I Size of Ring System Ring RID Analysis jSequence jthe Rings] Formula Identifier]Occurrence EA ] ES ] SZ ] RF ] RID ] Count 

8 REFERENCES IN FILE CAPREVIEWS 1307 REFERENCES IN FILE CA (1967 TO DATE) 

23 REFERENCES TO NON-SPECIFIC DERIVATIVES IN FILE CA 7 REFERENCES IN FILE CAOLD (PRIOR TO 1967) 

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The following sections explain the most important search strategies. Further and more specific search profiles should be processed after consultation of the manuals Search Field Guide for the Registry File (Dictionary) and Registry File Dictionary Searching. 

CHEMSEARCH is a dictionary listing of the most recently cited substances in CA Search (File 4) and is a companion file to CHEMNAME (File 31). For each substance listed, the following information is provided CAS Registry Number, molecular formula, and CA Substance Index Names. CHEMSEARCH includes all new chemical substances cited in the latest six issues of Chemical Abstracts. Also included are additional chemical substance search terms generated specifically for all DIALOG chemical name dictionaries. Chemical substances already in CHEMNAME are not included. Only the... 

This compound-oriented chemical dictionary file covers all compounds cited in the literature from 1972 to date. It may be searched by chemical name or fragment, by molecular formula or molecular formula fragment, or by group or row within the periodic chart. Each record contains a registry number, the molecular formula, and Chemical Abstract s rigorous nomenclature for a specific chemical. 

Associated with TOXLINE is the CHEMLINE file, which stands for Chemical Dictionary On Line. This file contains the CAS registry number, molecular formulas, and nomenclature for thousands of chemical substances. It can be used to identify names and synonyms of chemical substances that are often necessary as key words to search a data base. 

The National Library of Medicine s (NIH) on-line chemical dictionary file (CHEMLINE) is primarily used to enhance the retrieval of bibliographic Information associated with chemical substances. This discussion demonstrates the utility of CHEMLINE as a mechanism to link chemical substructures to biological data. Search techniques are developed to Integrate classes of structurally related chemicals with toxicity data and information contained in on-line retrieval files such as the Registry of Toxic Effects of Chemical Substances (RTECS) and TOXLINE. 

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