Chemical Abstracts Index Guide

Chemical Abstracts Index Guide, Appendix IV, Chemical Abstracts Service, Columbus, Ohio, 1994,1251—2721. 

Service CA (1997) Chemical Abstracts Index Guide 1997. Columbus... 

Although all alkaloids can be named by the principles already outlined in this article, the cumbersome nature of such names for complex ring systems makes it desirable to use trivial parent names for some large heterocyclic skeletons. It is preferable for such trivial names to refer to skeletons with no substituents (or very few), and it is often convenient for them to carry inherent stereochemical implications. The most extensive source of these names is the Chemical Abstracts Index Guide (or the Ninth Collective Index Nomenclature Manual), but the names given here do not correspond, in many cases, to those in common use, and IUPAC recommendations, when they appear, may well differ in some respects. Some of the principal skeletons listed by Chemical Abstracts are illustrated (122-130). 

Chemical Abstracts Index Guide 1999, American Chemical Society, 1999 (Diese Ausgabe weist gegenuber fruheren Ausgaben erhebliche Anderungen bei den stereochemischen Bezeichnungen auf.)... 

Chemical Abstracts Index Guide American Chemical Society Columbus, OH Appendix IV (updated periodically). 

Before using the General Subject Index, the Chemical Abstracts Index Guide (see Section I.I.I.3) should be consulted in order to obtain the correct index headings. 

Naming and Indexing of Chemical Substances for Chemical Abstracts (1991). H204. Chemical Abstracts Service, EO. Box 3012, Columbus, OH 43210 also published as Chemical Abstracts Index Guide, 1987-1991, Appendix IV (1991). 

The traditional demarcation of the chemistry of natural products from, e.g., the rest of organic chemistry, physics, biosciences and, in particular, biotechnology, molecular biology, and research on active principles is no longer possible. Thus the entire field of the extensively widened topic of natural products chemistry is now often referred to as bioorganic chemistry . The nomenclature principles of natural products - use of semisystematic names - are discussed in Section F of lUPAC rules. The Compendium of lUBMB, Biochemical Nomenclature, London Portland Press 1992, and in the Chemical Abstracts Index Guide. 

CA name Chemical Abstract Index Guide name... 

Quite naturally there is a certain amount of arbitrariness in this system, although the lUPAC nomenclature is followed. The preferred Chemical Abstracts index names for chemical substances have been, with very few exceptions, continued unchanged (since 1972) as set forth in the Ninth Collective Index Guide and in a journal article. Any revisions appear in the updated Index Guide new editions appear at 18-month intervals. Appendix VI is of particular interest to chemists. Reprints of the Appendix may be purchased from Chemical Abstracts Service, Marketing Division, P.O. Box 3012, Columbus, Ohio 43210. 

Chemical Abstracts indexing practice is summarised in the 1992 Index Guide, page 199, and is as follows. 

The Chemical Abstracts System (CAS) produces a set of various databases ranging from bibliographic to chemical structure and reaction databases. All the databases originate from the printed media of Chemical Abstracts, which was first published in 1907 and is divided into different topics. Author index, general index, chemical structure index, formula index, and index guide arc entries to the corresponding database (Table 5-3). 

CA.S Index Guide, Chemical Abstract Service, Columbus, Ohio, 1982, Appendix 4. 

J. H. Eletcher, O. C. Dermer, and R. B. Pox, Nomenclature of Organic Compounds, American Chemical Society Advances in Chemistry Series, Vol. 126, Washington, D.C., 1974 Selection of Index Namesfor Chemical Substances, Chem. Abstracts 82, Index Guide, American Chemical Society, Washington, D.C., 1982. 

Chemical Abstracts Ninth Collective Index, Index Guide, Appendix IV F. Specialized Substances, par. 215, pp. 2021—2051 (1972—1976). In the Tenth and Eleventh Collective Indexes, the corresponding page numbers are 1921—1951 and 1931—1971, respectively. 

Part I contains entries referring to the names of compounds according to the Chemical Abstracts Systematic Nomenclature (see Index Guide, Chemical Abstracts vol 76, 1972) The systematic name is followed by Chemical Abstracts Registry Number m brackets (see Chemical Abstracts Registry Handbook 1965-71 and Supplements) and page number... 

In this book we use the Nomenclature of Organic Chemistry of the International Union of Pure and Applied Chemistry, 1979 Edition ( Blue book , IUPAC, 1979), the Revised Nomenclature for Radicals, Ions, Radical Ions, and Related Species (IUPAC, 1993), and additional rules applied by the Chemical Abstracts Service for the 1987-1991 Index Guide Chemical Abstracts, 1992). 

Chemical Abstracts (1992) Twelfth Collective Index. Index Guide. American Chemical Society, Columbus OH [1.2]. 

Part II consists entirely of systematic names of specific compounds according to Chemical Abstracts nomenclature (see the Index Guide in Chemical Abstracts, Volume 76, 1972). Each compound is listed under the parent name as it would appear in Chemical Abstracts, and each entry from Volumes 56 through 59 is followed by the registry number in brackets. Entries from Volumes 58 and 59 are, for the most part, taken from the appendices which follow the procedures. When the Chemical Abstracts name differs in Collective Indices 8 and 9, both names have been included. Some compounds in the appendices of this volume have been omitted from the index in accord with the guidelines given for Part I. 

Abbreviations and acronyms are short forms of single words (e.g., M for molar) or multiple words (e.g., NMR for nuclear magnetic resonance). In abbreviations, the individual letters are usually pronounced (e.g., A-C-S for American Chemical Society) in acronyms, the letters form a new word (e.g., CASSl for Chemical Abstracts Service Source Index). Compound labels are used to represent chemical compounds. (See also chapter 3 and The ACS Style Guide for more information on abbreviations and acronyms.)... 

Simpler names for compounds of type 4 (mentioned in the guiding index of Chemical Abstracts) will be used in this survey the fundamental heterocycle 6f/-benzofuro[3,2-c][l]benzopyran-6-one is called cou-mestan.8 Coumestrol (4) becomes 3,9-dihydroxycoumestan. Another derivative of the same family, waedelolactone,9 is 3-methoxy-l,8,9-trihydroxycoumestan. In this connection, it would be advisable, for natural compounds of botanical origin, to put the corresponding chemical name in brackets. 

Although this procedure for replacement names is recommended in the Chemical Abstracts Ninth Collective Index Nomenclature Manual, the Index Guide now employs a more complicated system. 

Major changes in CAS nomenclature were made at the beginning of the ninth Collective Index period (1972), giving what became widely known as 9C1 nomenclature. This is described in the publication Naming and Indexing of Chemical Substances for Chemical Abstracts (Appendix IV to the CAS 1992 Index Guide, but also available separately). 

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