Apologies for any duplicate copies of this message. I am posting it on several lists. IUPAC Organic Chemical Nomenclature ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I have added to my IUPAC Nomenclature pages a Web version of the "Revision of the extended Hantzsch-Widman system of nomenclature for heteromonocycles, recommendations 1982" published in Pure Appl. Chem. 1983, 55, 409-416. If you are not familiar with this it describes how to name heterocyclic ring systems with up to a 10-membered ring, both in the saturated form and with the maximum number of non-cumulative double bonds. Trivially named rings such as furan, pyrrole and pyridine are not affected. Also recently added to these Web pages was the full text of the IUPAC IUBMB 1983 recommendations "Nomenclature and symbolism for amino acids and peptides" published in Eur. J. Biochem. 1984, 138, 9-37 and elsewhere. These documents can be acessed from the home page for IUPAC nomenclature, see address below. Gerry Moss ___________________________________________________________________ Dr GP Moss Telephone: +44 171 775 3262 Department of Chemistry Queen Mary & Westfield College Facsimile: +44 181 981 8745 Mile End Road London E1 4NS, United Kingdom E-mail: g.p.moss@qmw.ac.uk World Wide Web server: http://www.qmw.ac.uk/~ugca000/chemistry.html IUPAC data base http://www.qmw.ac.uk/~ugca000/iupac.html ----- chemweb: A list for Chemical Applications of the Internet. Archived as: http://www.ch.ic.ac.uk/hypermail/chemweb/ To unsubscribe, send to listserver@ic.ac.uk the following message; unsubscribe chemweb List coordinator, Henry Rzepa (rzepa@ic.ac.uk)